Add concept of whether video renderer supports rotation.

Rotation is best done when rendered in GPU, added the shader code which rotates the frame. For renderers which don't support rotation, the rotation will be done before sending down the frame to render. By default, assume renderer can't do rotation.

BUG=4145
R=glaznev@webrtc.org, pthatcher@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/43569004

Cr-Commit-Position: refs/heads/master@{#8660}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8660 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/examples/androidtests/src/org/appspot/apprtc/test/PeerConnectionClientTest.java

@@ -98,8 +98,7 @@ public class PeerConnectionClientTest extends InstrumentationTestCase
       doneRendering = new CountDownLatch(expectedFrames);
     }
 
-    @Override
-    public synchronized void setSize(int width, int height) {
+    private synchronized void setSize(int width, int height) {
       Log.d(TAG, "Set size: " + width + " x " + height);
       this.width = width;
       this.height = height;