22685 Generate Maven metadata files for engine artifacts (cla: yes, platform-android, waiting for tree to go green)

22692 Let FlutterFragment not pop the whole activity by default when more fragments are in the activity (cla: yes, platform-android, waiting for tree to go green)

22752 Add FlutterPlayStoreSplitApplication for simpler opt in to Split AOT (affects: engine, cla: yes, platform-android)

22760 started providing the GPU sync switch to external view embedders (cla: yes, platform-android, platform-ios)

22819 More rename from GPU thread to raster thread (cla: yes, platform-android, platform-ios, waiting for tree to go green)

22823 Revert “Fix race condition in key event handling on Android (#22658)” (cla: yes, platform-android)