19956 Revert “Implement delayed event synthesis key event handling for Android (#19024)” (cla: yes, platform-android)

19960 Roll CanvasKit to 0.17.2 (cla: yes)

19962 Use the GrDirectContext factories instead of deprecated GrContext ones (cla: yes, platform-android, platform-ios)

19967 Manual merge of Dart  a3815b6590…24c7666def (cla: yes)

19968 Add missing MouseCursorPlugin destroy call (cla: yes, perf: memory, platform-android, waiting for tree to go green)

19970 Add support for playing alert sound on MacOS (cla: yes)

19972 Remove android view from the Mutator stack (cla: yes, platform-android)