* get overlay working
* fix overlay drawing
* allow disabling overlay in pictures or videos
* Fix picture snapshot colors when there is an overlay
* Bug fixes
* Update example with watermark
* Fix bug
* Fix overlay orientation in pictures
* Fix overlay orientation in videos
* Fix overlay when changing preview size
* Fix bug
* Experiment
* Refactor EglViewport
* Refactor SnapshotPictureRecorder
* Use single EglViewport
* Refactor SnapshotVideoRecorder
* Bug fix
* fix some of the requested changes
* clean adding View to OverlayLayout
* Specify where to draw the overlay
* Refactor
* Remove unnecessary variable from CameraPreview
* Use mWithOverlay in SnapshotVideoRecorder
* Use multiple OverlayLayout
* Add explanation for OverlayLayoutManager
* override removeView