Rename media constraints model and store.

webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsStore.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.
  */
 
 #import <Foundation/Foundation.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
 /**
- * Light-weight persistent store for media constraints user settings.
+ * Light-weight persistent store for user settings.
  *
  * It will persist between application launches and application updates.
  */
-@interface ARDMediaConstraintsSettingsStore : NSObject
+@interface ARDSettingsStore : NSObject
 
 /**
  * Returns current video resolution media constraint string stored in the store.
  */
 - (nullable NSString *)videoResolutionConstraintsSetting;
 
 /**
  * Stores the provided value as video resolution media constraint.
  * @param value the string to be stored
  */
 - (void)setVideoResolutionConstraintsSetting:(NSString *)value;
 
 @end
 NS_ASSUME_NONNULL_END