fix(android): Reject unknown exit timestamps

Do not use current SDK options when an exit timestamp is unavailable because an intervening app update cannot be ruled out.

Co-Authored-By: Codex <noreply@openai.com>

Author: romtsn

sentry-android-core/src/main/java/io/sentry/android/core/ApplicationExitInfoEventProcessor.java

@@ -550,7 +550,7 @@ private boolean isAppNotUpdated(final @NotNull Backfillable hint) {
       timestamp = null;
     }
     if (timestamp == null) {
-      return true;
+      return false;
     }
 
     final PackageInfo packageInfo = ContextUtils.getPackageInfo(context, buildInfoProvider);

sentry-android-core/src/test/java/io/sentry/android/core/ApplicationExitInfoEventProcessorTest.kt

@@ -391,8 +391,9 @@ class ApplicationExitInfoEventProcessorTest {
   }
 
   @Test
-  fun `if environment is not persisted, uses environment from options`() {
-    val hint = HintUtils.createWithTypeCheckHint(BackfillableHint())
+  fun `if environment is not persisted and app was not updated, uses environment from options`() {
+    val hint = HintUtils.createWithTypeCheckHint(AbnormalExitHint(timestamp = 2_000))
+    setLastUpdateTime(1_000)
 
     val processed = processEvent(hint)
 
@@ -423,6 +424,18 @@ class ApplicationExitInfoEventProcessorTest {
     assertNull(processed.release)
   }
 
+  @Test
+  fun `if exit timestamp is unknown, leaves release empty`() {
+    val hint = HintUtils.createWithTypeCheckHint(AbnormalExitHint())
+    val processor = fixture.getSut(tmpDir)
+    fixture.options.release = "io.sentry.samples@1.2.0+232"
+    setLastUpdateTime(1_000)
+
+    val processed = processor.process(SentryEvent(), hint)!!
+
+    assertNull(processed.release)
+  }
+
   @Test
   fun `if last update time is invalid, leaves release empty`() {
     val hint = HintUtils.createWithTypeCheckHint(AbnormalExitHint(timestamp = 1_000))