Update iOS AppRTCDemo to use level controller.

webrtc/examples/objc/AppRTCDemo/tests/ARDAppClientTest.mm

 /*
  *  Copyright 2014 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 265 matching lines @@
     [answererConnectionExpectation fulfill];
   }];
   // TODO(tkchin): Figure out why DTLS-SRTP constraint causes thread assertion
   // crash in Debug.
   answerer.defaultPeerConnectionConstraints =
       [[RTCMediaConstraints alloc] initWithMandatoryConstraints:nil
                                             optionalConstraints:nil];
   weakAnswerer = answerer;
 
   // Kick off connection.
-  [caller connectToRoomWithId:roomId isLoopback:NO isAudioOnly:NO shouldMakeAecDump:NO];
-  [answerer connectToRoomWithId:roomId isLoopback:NO isAudioOnly:NO shouldMakeAecDump:NO];
+  [caller connectToRoomWithId:roomId
+                   isLoopback:NO
+                  isAudioOnly:NO
+            shouldMakeAecDump:NO
+        shouldUseLevelControl:NO];
+  [answerer connectToRoomWithId:roomId
+                     isLoopback:NO
+                    isAudioOnly:NO
+              shouldMakeAecDump:NO
+          shouldUseLevelControl:NO];
   [self waitForExpectationsWithTimeout:20 handler:^(NSError *error) {
     if (error) {
       NSLog(@"Expectations error: %@", error);
     }
   }];
 }
 
 @end
 
 @interface ARDSDPUtilsTest : ARDTestCase
@@ skipping 35 matching lines @@
 }
 
 TEST_F(SignalingTest, SDPTest) {
   @autoreleasepool {
     ARDSDPUtilsTest *test = [[ARDSDPUtilsTest alloc] init];
     [test testPreferVideoCodec];
   }
 }