3892 [video_player][camera] fix video_player camera tests (cla: yes, p: camera, p: video_player)

3908 [camera] Migrate maven repo from jcenter to mavenCentral (cla: yes, waiting for tree to go green, p: camera, platform-android)

3927 Mass pubspec.yaml cleanup (cla: yes, p: webview_flutter, p: camera, p: file_selector, p: google_maps_flutter, p: google_sign_in, p: image_picker, p: in_app_purchase, p: local_auth, p: path_provider, p: plugin_platform_interface, p: url_launcher, p: video_player, p: shared_preferences, p: espresso, p: quick_actions, p: ios_platform_images, platform-ios, platform-android, platform-windows, platform-macos, platform-linux, platform-web, p: flutter_plugin_android_lifecycle)