4187 [webview_flutter] Better documentation of Android Platform Views modes (cla: yes, waiting for tree to go green, p: webview_flutter)

4195 Skip a flaky webview_flutter integration test and extend firebase testlab timeout (cla: yes, p: webview_flutter)

4199 wake lock permission (cla: yes, p: webview_flutter, platform-android)

p: google_sign_in - 27 pull request(s)