4365 [url_launcher] Error handling when URL cannot be parsed with Uri.parse (cla: yes, waiting for tree to go green, p: url_launcher)

4406 Fix order-dependant platform interface tests (cla: yes, waiting for tree to go green, p: file_selector, p: google_maps_flutter, p: google_sign_in, p: url_launcher, p: video_player, p: quick_actions)

4451 upgraded usage of BinaryMessenger (cla: yes, p: android_intent, p: camera, p: url_launcher, p: quick_actions, platform-android, platform-web)

4453 A partial revert of the work done to accomodate Android Background Channels (cla: yes, p: android_intent, p: camera, p: url_launcher, p: quick_actions, platform-android)

last mile - 7 pull request(s)