CameraHelper can record video (only once per instance -> TODO allow for multiple times).
CameraPreviewActivity: Take 5 photos as fast as possible, then save them on button press.
New activity to record video.
Can set camera orientation in CameraHelper.
LedActivity now uses openCV's JavaCameraView to be able to process preview frames.
LedActivity receives Timesync command and sends back a series of brightness values with timestamps.
MainActivity connects to OpenCV manager and loads native library.