Add functionality to get the video stream from the tangible tracking camera.

[patrickdown]

The Tilt Five glasses have a tangible tracking camera. The intent of this camera is to allow mixing of physical media, like cards or figures, with the digital game. The frame capture from this camera is exposed via the NDK. This functionality should be exposed to Godot.

Special consideration should be given to feeding this video stream to libraries like OpenCV for image processing.

[patrickdown]

Relevant docs

[patrickdown]

Might consider a separate addon library that feeds the camera to OpenCV in the background for image recognition and feeds the results as tracking events to Godot.