25943 Update documentation for embedding SplashScreen (platform-android, cla: yes, waiting for tree to go green)

25952 Added exception if you try to reply with a non-direct ByteBuffer. (platform-android, cla: yes)

25954 [flutter_releases] Flutter Beta 2.2.0-10.3.pre Engine Cherrypicks (cla: yes)

25957 [web] Resolve OS as iOs for iDevice Safari requesting desktop version of app. (cla: yes, waiting for tree to go green, platform-web)

25961 Hardware Keyboard: iOS (platform-ios, cla: yes, platform-macos, embedder)

25964 Fix GIR transfer annotation (cla: yes, platform-linux)

25982 Web ImageFilter.matrix support (cla: yes, waiting for tree to go green, platform-web)