19212 Reland “Add GetBoundingRectAfterMutations to EmbeddedViewParams to calculate the final bounding rect for platform view #19170” (cla: yes, platform-android, platform-ios)

19242 Android platform view static thread merging (cla: yes, platform-android, platform-ios, waiting for tree to go green)

19249 Made [SemanticsObject setAccessibilityContainer] a noop. (cla: yes, platform-ios)

19257 EndFrame should be always called by rasterizer (cla: yes, platform-android, platform-ios)

19289 Call Dart_NotifyLowMemory more on iOS (cla: yes, platform-ios, waiting for tree to go green)