2188 [android_intent] Bump the Flutter SDK min version (cla: yes)

2189 [battery] relax the example app minimal required Flutter version  (cla: yes)

2190 [e2e] Update to support new embedder (cla: yes)

2191 [image_picker] Fix iOS build and analyzer warnings (cla: yes)

2192 [in_app_purchase] Fix iOS build warning (cla: yes)

2194 [battery] add e2e dependency to the example app (cla: yes)

2195 [android_intent] Cleanup the V2 migration (cla: yes)

2196 [webview_flutter] (Trivial) Add V2 warnings (cla: yes)

2197 Enable testing on both master and stable (cla: yes)