3458 [camera] Clockwise rotation of focus point in android (cla: yes, p: camera, platform-android)

3472 [camera] Fix example reference in camera’s doc (cla: yes, p: camera)

3496 [camera] Revert compileSdkVersion back to 29 (cla: yes, p: camera, platform-android, waiting for tree to go green)

3497 [camera_platform_interface] Migrate to null safety (cla: yes, nnbd, p: camera)

3501 Merge upcoming camera updates (cla: yes, p: camera)

3503 [camera] Removed obsolete example folder from camera root (cla: yes, p: camera, platform-android)

3518 [camera_platform_interface] Added stopRecordingVideo (cla: yes, p: camera)