Address denicija's comments for AppRTCMobile video codec setting.

webrtc/examples/objc/AppRTCMobile/ARDSettingsModel.h

 /*
  *  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.
  */
 
@@ skipping 35 matching lines @@
  * @return YES/NO depending on success.
  */
 - (BOOL)storeVideoResolutionSetting:(NSString *)resolution;
 
 /**
  * Returns array of available video codecs.
  */
 - (NSArray<NSString *> *)availableVideoCodecs;
 
 /**
- * Returns current video codec setting from store if present.
+ * Returns current video codec setting from store if present or default (H264) otherwise.
  */
 - (NSString *)currentVideoCodecSettingFromStore;
 
 /**
  * Stores the provided video codec setting into the store.
  *
  * If the provided video codec is not part of the available video codecs
  * the store operation will not be executed and NO will be returned.
  * @param video codec settings the string to be stored.
  * @return YES/NO depending on success.
  */
 - (BOOL)storeVideoCodecSetting:(NSString *)videoCodec;
 
 /**
  * Returns current max bitrate setting from store if present.
  */
 - (nullable NSNumber *)currentMaxBitrateSettingFromStore;
 
 /**
  * Stores the provided bitrate value into the store.
  *
  * @param bitrate NSNumber representation of the max bitrate value.
  */
 - (void)storeMaxBitrateSetting:(nullable NSNumber *)bitrate;
 
 @end
 NS_ASSUME_NONNULL_END