Reland of Add bitrate section to settings view controller.

webrtc/examples/objc/AppRTCMobile/ios/ARDMainViewController.m

 /*
  *  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 154 matching lines @@
   [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeMain
                                block:^{
     RTCLog(@"audioSessionDidStopPlayOrRecord");
     [self restartAudioPlayerIfNeeded];
   }];
 }
 
 #pragma mark - Private
 - (void)showSettings:(id)sender {
   ARDSettingsViewController *settingsController =
-      [[ARDSettingsViewController alloc] initWithStyle:UITableViewStylePlain
+      [[ARDSettingsViewController alloc] initWithStyle:UITableViewStyleGrouped
                                  mediaConstraintsModel:[[ARDMediaConstraintsModel alloc] init]];
   UINavigationController *navigationController =
       [[UINavigationController alloc] initWithRootViewController:settingsController];
   [self presentViewControllerAsModal:navigationController];
 }
 
 - (void)presentViewControllerAsModal:(UIViewController *)viewController {
   [self presentViewController:viewController animated:YES completion:nil];
 }
 
@@ skipping 43 matching lines @@
 - (void)showAlertWithMessage:(NSString*)message {
   UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:nil
                                                       message:message
                                                      delegate:nil
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:nil];
   [alertView show];
 }
 
 @end