4228 [image_picker] Fix pickImage not returning on iOS when dismissing the PHPicker view by swiping down. (cla: yes, waiting for tree to go green, p: image_picker, platform-ios)

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)

4288 [image_picker] add forceFullMetadata to interface (cla: yes, waiting for tree to go green, p: image_picker, platform-web)