Move /webrtc/api/android files to /webrtc/sdk/android

webrtc/sdk/android/api/org/webrtc/CameraSession.java

 /*
  *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 17 matching lines @@
     void onTextureFrameCaptured(CameraSession session, int width, int height, int oesTextureId,
         float[] transformMatrix, int rotation, long timestamp);
   }
 
   /**
    * Stops the capture. Waits until no more calls to capture observer will be made.
    * If waitCameraStop is true, also waits for the camera to stop.
    */
   void stop();
 }