Using HTML slots to render platform views in the web

Reverted change in 2.2

The following breaking change was reverted in release 2.2:

Network Policy on iOS and Android

Introduced in version: 2.0.0
Reverted in version:   2.2.0 (proposed)

Released in Flutter 2.2

Default Scrollbars on Desktop

Released in Flutter 2

Added BuildContext parameter to TextEditingController.buildTextSpan

Android ActivityControlSurface attachToActivity signature change

Android FlutterMain.setIsRunningInRobolectricTest testing API removed

Clip behavior

Deprecated API removed after v1.22

Dry layout support for RenderBox

Eliminating nullOk Parameters

Material Chip button semantics