* 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
* added video recording callback
* updated test
* added annotation to dispatch function
* updated review comments for video recording callback
* reverted unwanted changes
* Add tests and changelog
* Fix video tests
* implemented exposure correction for Camera2
* implemented zoom for camera2
* zoom implementation in Camera2Engine
* refactored code for camera2 zoom
* refactored code for zoom and exposure
* change condition for zoom rect
* Create AutoFocusMarker and DefaultAutoFocusMarker
* Ensure onFocusEnd is called
* Add cameraAutoFocusMarker XML tag
* Update docs
* Fix changelog and migration guide
* Fix tests
* New getSurfaceSize internal method
* Rename setPreviewSize and all internals to setPreviewStreamSize
* Rename getSurfaceSize to getPreviewSurfaceSize
* New snapshotMaxWidth and snapshotMaxHeight APIs
* Add docs
* Improve rescaling logic
* Add tests