Pass settings model to ARDAppClient instead of individual settings.

webrtc/examples/objc/AppRTCMobile/ARDSettingsModel.m

 /*
  *  Copyright 2016 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.
  */
 
 #import "ARDSettingsModel+Private.h"
 #import "ARDSettingsStore.h"
 #import "WebRTC/RTCMediaConstraints.h"
 
 NS_ASSUME_NONNULL_BEGIN
 static NSArray<NSString *> *videoResolutionsStaticValues() {
   return @[ @"640x480", @"960x540", @"1280x720" ];
 }
 
-static NSArray<NSString *> *videoCodecsStaticValues() {
-  return @[ @"H264", @"VP8", @"VP9" ];
-}
+static NSArray<NSString *> *videoCodecsStaticValues() { return @[ @"H264", @"VP8", @"VP9" ]; }
 
 @interface ARDSettingsModel () {
   ARDSettingsStore *_settingsStore;
 }
 @end
 
 @implementation ARDSettingsModel
 
 - (NSArray<NSString *> *)availableVideoResoultionsMediaConstraints {
   return videoResolutionsStaticValues();
@@ skipping 99 matching lines @@
     mediaConstraintsDictionary = @{
       kRTCMediaConstraintsMinWidth : widthConstraint,
       kRTCMediaConstraintsMinHeight : heightConstraint
     };
   }
   return mediaConstraintsDictionary;
 }
 
 @end
 NS_ASSUME_NONNULL_END