Remove legacy architecture stub: UIImplementation (#56826)

Summary:
Pull Request resolved: #56826

This class was fully stubbed out as part of the Legacy Architecture removal. All public methods had empty bodies or returned null/0, meaning any OSS library still referencing it was already silently broken at runtime.

- `UIImplementation` — all methods empty stubs

Also removes the dead `getUIImplementation()` method from `UIManagerModule`, and cleans up stale Javadoc references in `JSTouchDispatcher`, `ReactViewGroup`, and `ReactInterceptingViewGroup`.

`UIBlock`, `NativeViewHierarchyManager`, `UIViewOperationQueue`, and the `addUIBlock`/`prependUIBlock` methods on `UIManagerModule` are retained and will be deprecated in a follow-up diff.

Changelog:
[Android][Removed] - Remove legacy architecture stub `UIImplementation`. This class was already non-functional (all methods were empty stubs).

Reviewed By: christophpurrer

Differential Revision: D104991922

fbshipit-source-id: 8a4bb015453f2bf441deec9ac914b08642faab44

Author: cortinico

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -4209,63 +4209,6 @@ public abstract interface class com/facebook/react/uimanager/UIBlock {
 	public abstract fun execute (Lcom/facebook/react/uimanager/NativeViewHierarchyManager;)V
 }
 
-public class com/facebook/react/uimanager/UIImplementation {
-	protected fun <init> (Lcom/facebook/react/bridge/ReactApplicationContext;Lcom/facebook/react/uimanager/ViewManagerRegistry;Lcom/facebook/react/uimanager/UIViewOperationQueue;Lcom/facebook/react/uimanager/events/EventDispatcher;)V
-	public fun addUIBlock (Lcom/facebook/react/uimanager/UIBlock;)V
-	protected fun calculateRootLayout (Lcom/facebook/react/uimanager/ReactShadowNode;)V
-	public fun clearJSResponder ()V
-	public fun configureNextLayoutAnimation (Lcom/facebook/react/bridge/ReadableMap;Lcom/facebook/react/bridge/Callback;)V
-	protected fun createRootShadowNode ()Lcom/facebook/react/uimanager/ReactShadowNode;
-	protected fun createShadowNode (Ljava/lang/String;)Lcom/facebook/react/uimanager/ReactShadowNode;
-	public fun createView (ILjava/lang/String;ILcom/facebook/react/bridge/ReadableMap;)V
-	public fun dispatchViewManagerCommand (IILcom/facebook/react/bridge/ReadableArray;)V
-	public fun dispatchViewManagerCommand (ILjava/lang/String;Lcom/facebook/react/bridge/ReadableArray;)V
-	public fun dispatchViewUpdates (I)V
-	public fun findSubviewIn (IFFLcom/facebook/react/bridge/Callback;)V
-	public fun getProfiledBatchPerfCounters ()Ljava/util/Map;
-	public fun getRootViewNum ()I
-	protected fun handleCreateView (Lcom/facebook/react/uimanager/ReactShadowNode;ILcom/facebook/react/uimanager/ReactStylesDiffMap;)V
-	protected fun handleUpdateView (Lcom/facebook/react/uimanager/ReactShadowNode;Ljava/lang/String;Lcom/facebook/react/uimanager/ReactStylesDiffMap;)V
-	public fun manageChildren (ILcom/facebook/react/bridge/ReadableArray;Lcom/facebook/react/bridge/ReadableArray;Lcom/facebook/react/bridge/ReadableArray;Lcom/facebook/react/bridge/ReadableArray;Lcom/facebook/react/bridge/ReadableArray;)V
-	public fun measure (ILcom/facebook/react/bridge/Callback;)V
-	public fun measureInWindow (ILcom/facebook/react/bridge/Callback;)V
-	public fun measureLayout (IILcom/facebook/react/bridge/Callback;Lcom/facebook/react/bridge/Callback;)V
-	public fun measureLayoutRelativeToParent (ILcom/facebook/react/bridge/Callback;Lcom/facebook/react/bridge/Callback;)V
-	public fun onCatalystInstanceDestroyed ()V
-	public fun onHostDestroy ()V
-	public fun onHostPause ()V
-	public fun onHostResume ()V
-	public fun prependUIBlock (Lcom/facebook/react/uimanager/UIBlock;)V
-	public fun profileNextBatch ()V
-	public fun registerRootView (Landroid/view/View;ILcom/facebook/react/uimanager/ThemedReactContext;)V
-	public fun removeLayoutUpdateListener ()V
-	public fun removeRootShadowNode (I)V
-	public fun removeRootView (I)V
-	protected final fun removeShadowNode (Lcom/facebook/react/uimanager/ReactShadowNode;)V
-	public fun replaceExistingNonRootView (II)V
-	public fun resolveRootTagFromReactTag (I)I
-	public final fun resolveShadowNode (I)Lcom/facebook/react/uimanager/ReactShadowNode;
-	protected final fun resolveViewManager (Ljava/lang/String;)Lcom/facebook/react/uimanager/ViewManager;
-	public fun sendAccessibilityEvent (II)V
-	public fun setChildren (ILcom/facebook/react/bridge/ReadableArray;)V
-	public fun setJSResponder (IZ)V
-	public fun setLayoutAnimationEnabledExperimental (Z)V
-	public fun setLayoutUpdateListener (Lcom/facebook/react/uimanager/UIImplementation$LayoutUpdateListener;)V
-	public fun setViewLocalData (ILjava/lang/Object;)V
-	public fun synchronouslyUpdateViewOnUIThread (ILcom/facebook/react/uimanager/ReactStylesDiffMap;)V
-	public fun updateInsetsPadding (IIIII)V
-	public fun updateNodeSize (III)V
-	public fun updateRootView (III)V
-	public fun updateRootView (Lcom/facebook/react/uimanager/ReactShadowNode;II)V
-	public fun updateView (ILjava/lang/String;Lcom/facebook/react/bridge/ReadableMap;)V
-	protected fun updateViewHierarchy ()V
-	public fun viewIsDescendantOf (IILcom/facebook/react/bridge/Callback;)V
-}
-
-public abstract interface class com/facebook/react/uimanager/UIImplementation$LayoutUpdateListener {
-	public abstract fun onLayoutUpdated (Lcom/facebook/react/uimanager/ReactShadowNode;)V
-}
-
 public final class com/facebook/react/uimanager/UIManagerHelper {
 	public static final field INSTANCE Lcom/facebook/react/uimanager/UIManagerHelper;
 	public static final field PADDING_BOTTOM_INDEX I
@@ -4308,7 +4251,6 @@ public class com/facebook/react/uimanager/UIManagerModule : com/facebook/react/b
 	public fun getEventDispatcher ()Lcom/facebook/react/uimanager/events/EventDispatcher;
 	public fun getName ()Ljava/lang/String;
 	public fun getPerformanceCounters ()Ljava/util/Map;
-	public fun getUIImplementation ()Lcom/facebook/react/uimanager/UIImplementation;
 	public fun getViewManagerRegistry_DO_NOT_USE ()Lcom/facebook/react/uimanager/ViewManagerRegistry;
 	public fun initialize ()V
 	public fun invalidate ()V
@@ -4361,7 +4303,6 @@ public class com/facebook/react/uimanager/UIViewOperationQueue {
 	public fun enqueueDispatchCommand (IILcom/facebook/react/bridge/ReadableArray;)V
 	public fun enqueueDispatchCommand (ILjava/lang/String;Lcom/facebook/react/bridge/ReadableArray;)V
 	public fun enqueueFindTargetForTouch (IFFLcom/facebook/react/bridge/Callback;)V
-	public fun enqueueLayoutUpdateFinished (Lcom/facebook/react/uimanager/ReactShadowNode;Lcom/facebook/react/uimanager/UIImplementation$LayoutUpdateListener;)V
 	public fun enqueueManageChildren (I[I[Lcom/facebook/react/uimanager/ViewAtIndex;[I)V
 	public fun enqueueMeasure (ILcom/facebook/react/bridge/Callback;)V
 	public fun enqueueMeasureInWindow (ILcom/facebook/react/bridge/Callback;)V

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/touch/ReactInterceptingViewGroup.kt

@@ -10,10 +10,10 @@ package com.facebook.react.touch
 import android.view.ViewGroup
 
 /**
- * This interface should be implemented by all [ViewGroup] subviews that can be instantiating by
- * [com.facebook.react.uimanager.NativeViewHierarchyManager]. It is used to configure
- * onInterceptTouch event listener which then is used to control touch event flow in cases in which
- * they requested to be intercepted by some parent view based on a JS gesture detector.
+ * This interface should be implemented by all [ViewGroup] subviews managed by React Native. It is
+ * used to configure onInterceptTouch event listener which then is used to control touch event flow
+ * in cases in which they requested to be intercepted by some parent view based on a JS gesture
+ * detector.
  */
 internal interface ReactInterceptingViewGroup {
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/JSTouchDispatcher.kt

@@ -98,10 +98,8 @@ public class JSTouchDispatcher(private val viewGroup: ViewGroup) {
         FLog.e(ReactConstants.TAG, "Got DOWN touch before receiving UP or CANCEL from last gesture")
       }
 
-      // First event for this gesture. We expect tag to be set to -1, and we use helper method
-      // [com.facebook.react.uimanager.NativeViewHierarchyManager.findTargetTagForTouch] to find
-      // react view ID that will be responsible for handling
-      // this gesture
+      // First event for this gesture. We expect tag to be set to -1, and we use
+      // findTargetTagAndSetCoordinates to find the react view ID that will handle this gesture
       childIsHandlingNativeGesture = false
       gestureStartTime = ev.eventTime
       targetTag = findTargetTagAndSetCoordinates(ev)