Add an option to enable level control to Android AppRTC Demo.

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.
  */
 
@@ skipping 70 matching lines @@
   public static final String EXTRA_AECDUMP_ENABLED =
       "org.appspot.apprtc.AECDUMP";
   public static final String EXTRA_OPENSLES_ENABLED =
       "org.appspot.apprtc.OPENSLES";
   public static final String EXTRA_DISABLE_BUILT_IN_AEC =
       "org.appspot.apprtc.DISABLE_BUILT_IN_AEC";
   public static final String EXTRA_DISABLE_BUILT_IN_AGC =
       "org.appspot.apprtc.DISABLE_BUILT_IN_AGC";
   public static final String EXTRA_DISABLE_BUILT_IN_NS =
       "org.appspot.apprtc.DISABLE_BUILT_IN_NS";
+    public static final String EXTRA_ENABLE_LEVEL_CONTROL =
+      "org.appspot.apprtc.ENABLE_LEVEL_CONTROL";
   public static final String EXTRA_DISPLAY_HUD =
       "org.appspot.apprtc.DISPLAY_HUD";
   public static final String EXTRA_TRACING = "org.appspot.apprtc.TRACING";
   public static final String EXTRA_CMDLINE =
       "org.appspot.apprtc.CMDLINE";
   public static final String EXTRA_RUNTIME =
       "org.appspot.apprtc.RUNTIME";
   private static final String TAG = "CallRTCClient";
 
   // List of mandatory application permissions.
@@ skipping 145 matching lines @@
         intent.getStringExtra(EXTRA_VIDEOCODEC),
         intent.getBooleanExtra(EXTRA_HWCODEC_ENABLED, true),
         intent.getBooleanExtra(EXTRA_CAPTURETOTEXTURE_ENABLED, false),
         intent.getIntExtra(EXTRA_AUDIO_BITRATE, 0),
         intent.getStringExtra(EXTRA_AUDIOCODEC),
         intent.getBooleanExtra(EXTRA_NOAUDIOPROCESSING_ENABLED, false),
         intent.getBooleanExtra(EXTRA_AECDUMP_ENABLED, false),
         intent.getBooleanExtra(EXTRA_OPENSLES_ENABLED, false),
         intent.getBooleanExtra(EXTRA_DISABLE_BUILT_IN_AEC, false),
         intent.getBooleanExtra(EXTRA_DISABLE_BUILT_IN_AGC, false),
-        intent.getBooleanExtra(EXTRA_DISABLE_BUILT_IN_NS, false));
+        intent.getBooleanExtra(EXTRA_DISABLE_BUILT_IN_NS, false),
+        intent.getBooleanExtra(EXTRA_ENABLE_LEVEL_CONTROL, false));
     commandLineRun = intent.getBooleanExtra(EXTRA_CMDLINE, false);
     runTimeMs = intent.getIntExtra(EXTRA_RUNTIME, 0);
 
     // Create connection client. Use DirectRTCClient if room name is an IP otherwise use the
     // standard WebSocketRTCClient.
     if (loopback || !DirectRTCClient.IP_PATTERN.matcher(roomId).matches()) {
       appRtcClient = new WebSocketRTCClient(this, new LooperExecutor());
     } else {
       Log.i(TAG, "Using DirectRTCClient because room name looks like an IP.");
       appRtcClient = new DirectRTCClient(this);
@@ skipping 456 matching lines @@
         }
       }
     });
   }
 
   @Override
   public void onPeerConnectionError(final String description) {
     reportError(description);
   }
 }