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

2199 Revert “Enable testing on both master and stable (#2197)” (cla: yes)

2200 [flutter_webview] Revert v2 embedder support (cla: yes)

2201 [url_launcher] Revert embedding support (cla: yes)

2202 [android_intent] componentName must be provided before resolveActivity is called (cla: yes, waiting for test harness)

2203 Re-land testing of plugins on stable (cla: yes)

2204 [url_launcher] Re-land v2 embedding support (cla: yes)

2205 s/flutter_android_lifecycle/flutter_plugin_android_lifecycle/ (cla: yes)