flutter#28602: Allow PointerEnterEvent and PointerExitEvents to be created from any PointerEvent

flutter#28953: Include platformViewId in semantics tree

flutter#27612: Force line height in TextFields with strut

flutter#30991: Use full height of the glyph for caret height on Android

flutter#30414: Remove pressure customization from some pointer events

engine#8274: [ui] Add null check in FontWeight.lerp

Severe Performance and Crash Changes

In this release, we fixed several severe performance and crash issues.

flutter#30990: Allow profile widget builds in profile mode

flutter#30985: Add rrect contains microbenchmark

flutter#28651: Cannot execute operation because FlutterJNI is not attached to native.

iOS Changes