4189 Remove remaining V1 embedding references (cla: yes, p: battery, p: package_info, platform-android)

4193 Move unit tests to Android modules (cla: yes, p: google_maps_flutter, p: google_sign_in, p: image_picker, platform-android)

4198 Remove pubspec.yaml examples from READMEs (cla: yes, waiting for tree to go green, p: file_selector, p: google_sign_in, p: image_picker, p: in_app_purchase, p: path_provider, p: url_launcher, p: video_player, p: shared_preferences, platform-ios, platform-android, platform-windows, platform-macos, platform-linux, platform-web)

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