3030 Remove no-op android folders (cla: yes)

3032 [video_player_platform_interface] Playback speed (cla: yes)

3034 [all] Update CODEOWNERS to properly request reviews (cla: yes)

3036 [image_picker] changed ExifInterface to AndroidX version, including d… (cla: yes)

3037 [image_picker] Updated docs getImage() about preference rear front not working on Android (cla: yes)

3040 [url_launcher] Document why canLaunch can return false on Android API 30 (cla: yes)

3042 Update android sdk version to 29 for all mobile plugins. (cla: yes)

3043 [android_intent] Android Code Inspection and Clean up (cla: yes)