Android camera capture/renderer java code

Android camera capture/renderer library requirements: a- _CameraFramesCapturer_ -open/start camera capturing API -produce YUV420 frames -deliver frames to Callback -close/stop camera capturing API b-_CameraFramesViewer_: -has open/close API -has method to receive and draw YUV420 frames -can display up to 4 frames at the same time (different positions) c-_Small app to test lib_