4242 Fix and test for ‘implements’ pubspec entry (cla: yes, p: camera, p: file_selector, p: google_maps_flutter, p: google_sign_in, p: image_picker, p: in_app_purchase, p: url_launcher, p: video_player, p: shared_preferences, p: connectivity, platform-ios, platform-android, platform-macos, platform-web)

4259 [camera_web] Add onCameraClosing implementation (cla: yes, waiting for tree to go green, p: camera, platform-web)

4273 [flutter_plugin_tools] Check ‘implements’ for unpublished plugins (cla: yes, waiting for tree to go green, p: camera, platform-web)

4278 [camera_web] Add an initial device orientation event (cla: yes, waiting for tree to go green, p: camera, platform-web)