Fix VP9 support in AppRTCDemo.

webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java

 /*
  *  Copyright 2015 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.
  */
 
 package org.appspot.apprtc;
 
 import org.appspot.apprtc.AppRTCClient.RoomConnectionParameters;
 import org.appspot.apprtc.AppRTCClient.SignalingParameters;
 import org.appspot.apprtc.PeerConnectionClient.PeerConnectionParameters;
 import org.appspot.apprtc.util.LooperExecutor;
 
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.FragmentTransaction;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.net.Uri;
-import android.opengl.GLSurfaceView;
 import android.os.Bundle;
 import android.os.Handler;
 import android.util.Log;
 import android.view.View;
 import android.view.Window;
 import android.view.WindowManager.LayoutParams;
 import android.widget.Toast;
 
 import org.webrtc.EglBase;
 import org.webrtc.IceCandidate;
@@ skipping 605 matching lines @@
         }
       }
     });
   }
 
   @Override
   public void onPeerConnectionError(final String description) {
     reportError(description);
   }
 }