4230 [camera_web] Handle camera errors in takePicture (cla: yes, waiting for tree to go green, p: camera, platform-web)

4231 Move test packages from dependencies to dev_dependencies (cla: yes, waiting for tree to go green, p: in_app_purchase, p: video_player, platform-ios, platform-android)

4236 [camera] Fix a disposed CameraController error thrown when changing a camera (cla: yes, waiting for tree to go green, p: camera)

4241 [video_player] removed video player is not functional on ios simulators warning (cla: yes, waiting for tree to go green, p: video_player)

4245 Add unit tests to quick_actions plugin (cla: yes, waiting for tree to go green, p: quick_actions, platform-android)