#7567 Rename FlutterResult in embedder.h

In the Embedder API, the FlutterResult type has been renamed to FlutterEngineResult to better explain its purpose. You’ll need to rename any instances of the former to the latter.

#7414 Strut implementation

Rename dart:ui ParagraphStyle.lineHeight to ParagraphStyle.height. The ParagraphStyle.lineHeight property previously did not do anything and was renamed to stay consistent with TextStyle.height. You’ll need to rename any instances of the former to the latter.

Regressions

Soon after our 1.2 release, we found two regressions:

#28640 NoSuchMethodError: android.view.MotionEvent.isFromSource