Bug 1658937 - [3.2] Update changelog. r=geckoview-reviewers,agi

Differential Revision: https://phabricator.services.mozilla.com/D90912

mobile/android/geckoview/api.txt

@@ -1373,7 +1373,6 @@ package org.mozilla.geckoview {
     method default public void onFullscreen(@NonNull GeckoSession, @NonNull MediaSession, boolean, @Nullable MediaSession.ElementMetadata);
     method default public void onMetadata(@NonNull GeckoSession, @NonNull MediaSession, @NonNull MediaSession.Metadata);
     method default public void onPause(@NonNull GeckoSession, @NonNull MediaSession);
-    method default public void onPictureInPicture(@NonNull GeckoSession, @NonNull MediaSession, boolean);
     method default public void onPlay(@NonNull GeckoSession, @NonNull MediaSession);
     method default public void onPositionState(@NonNull GeckoSession, @NonNull MediaSession, @NonNull MediaSession.PositionState);
     method default public void onStop(@NonNull GeckoSession, @NonNull MediaSession);

mobile/android/geckoview/src/main/java/org/mozilla/geckoview/doc-files/CHANGELOG.md

@@ -17,8 +17,13 @@ exclude: true
 - Added [`WebExtension.MetaData.temporary`][83.1] which exposes whether an extension
   has been installed temporarily, e.g. when using web-ext.
   ([bug 1624410]({{bugzilla}}1624410))
+- ⚠️  Removing unsupported `MediaSession.Delegate.onPictureInPicture` for now.
+  Also, [`MediaSession.Delegate.onMetadata`][83.2] is no longer dispatched for
+  plain media elements.
+  ([bug 1658937]({{bugzilla}}1658937))
 
 [83.1]: {{javadoc_uri}}/WebExtension.MetaData.html#temporary
+[83.2]: {{javadoc_uri}}/MediaSession.Delegate.html#onMetadata-org.mozilla.geckoview.GeckoSession-org.mozilla.geckoview.MediaSession-org.mozilla.geckoview.MediaSession.Metadata-
 
 ## v82
 - ⚠️  [`WebNotification.source`][79.2] is now `@Nullable` to account for
@@ -808,4 +813,4 @@ to allow adding gecko profiler markers.
 [65.24]: {{javadoc_uri}}/CrashReporter.html#sendCrashReport-android.content.Context-android.os.Bundle-java.lang.String-
 [65.25]: {{javadoc_uri}}/GeckoResult.html
 
-[api-version]: 8a8ae9a25f36172359421f78ec83bb8613621541
+[api-version]: 01fdaf45cfe4dc5974de314cbdb79584781eb282