4408 [image_picker][android] suppress unchecked warning (cla: yes, waiting for tree to go green, p: image_picker, platform-android)

4413 [flutter_plugin_android_lifecycle] remove placeholder dart file (cla: yes, waiting for tree to go green, p: flutter_plugin_android_lifecycle)

4417 [webview_flutter] Implement zoom enabled for ios and android (cla: yes, waiting for tree to go green, p: webview_flutter, platform-ios, platform-android, last mile)

4418 [camera] Add filter for unsupported cameras on Android (cla: yes, waiting for tree to go green, p: camera, platform-android)

4419 Fix Java version (cla: yes, waiting for tree to go green, p: video_player, p: connectivity, platform-android)