fix(samples): Use float literal for session-replay sample rate (#5764)

The Android sample manifest set io.sentry.session-replay.session-sample-rate
to the integer literal "1", which aapt stores as an int. ManifestMetadataReader
reads it via Bundle.getFloat, which does not coerce an int-typed value and logs
a framework warning before falling back to getInt on startup. Using the float
literal "1.0" stores it as a float so getFloat succeeds and no warning is logged.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: runningcode

sentry-samples/sentry-samples-android/src/main/AndroidManifest.xml

@@ -271,7 +271,7 @@
       android:value="canvas" />
     <meta-data
       android:name="io.sentry.session-replay.session-sample-rate"
-      android:value="1" />
+      android:value="1.0" />
     <meta-data
       android:name="io.sentry.session-replay.mask-all-text"
       android:value="true" />