Add support for scaling textures in AndroidVideoCapturer.

talk/app/webrtc/java/android/org/webrtc/VideoCapturerAndroid.java

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 282 matching lines @@
         if (handler != null) {
           handler.onCameraSwitchDone(
               info.facing == android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT);
         }
       }
     });
   }
 
   // Requests a new output format from the video capturer. Captured frames
   // by the camera will be scaled/or dropped by the video capturer.
+  // It does not matter if width and height are flipped. I.E, |width| = 640, |height| = 480 produce
+  // the same result as |width| = 480, |height| = 640.
   // TODO(magjed/perkj): Document what this function does. Change name?
   public void onOutputFormatRequest(final int width, final int height, final int framerate) {
     cameraThreadHandler.post(new Runnable() {
       @Override public void run() {
         onOutputFormatRequestOnCameraThread(width, height, framerate);
       }
     });
   }
 
   // Reconfigure the camera to capture in a new format. This should only be called while the camera
@@ skipping 625 matching lines @@
     private native void nativeOnByteBufferFrameCaptured(long nativeCapturer,
         byte[] data, int length, int width, int height, int rotation, long timeStamp);
     private native void nativeOnTextureFrameCaptured(long nativeCapturer, int width, int height,
         int oesTextureId, float[] transformMatrix, long timestamp);
     private native void nativeOnOutputFormatRequest(long nativeCapturer,
         int width, int height, int framerate);
   }
 
   private static native long nativeCreateVideoCapturer(VideoCapturerAndroid videoCapturer);
 }