2206 [flutter_plugin_android_lifecycle] Update README with new plugin name (cla: yes)

2207 [flutter_plugin_android_lifecycle] bump e2e depenency to 0.2.1 (cla: yes)

2208 delete all example/android/app/gradle.properties files (cla: yes)

2209 [webview_flutter] Re-land support v2 embedding support (cla: yes)

2211 Ensure that when testing on stable Cirrus is upgraded to latest on iOS (cla: yes)

2212 [connectivity]remove AndroidX constraint (cla: yes)

2215 [in_app_purchase] remove AndroidX constraint (cla: yes)

2216 [battery]Use android.arch.lifecycle instead of androidx.lifecycle:lifecycle in (cla: yes)