Use new RTCCameraVideoCapturer in AppRTCMobile.

webrtc/examples/objc/AppRTCMobile/ARDSettingsStore.h

Index: webrtc/examples/objc/AppRTCMobile/ARDSettingsStore.h
diff --git a/webrtc/examples/objc/AppRTCMobile/ARDSettingsStore.h b/webrtc/examples/objc/AppRTCMobile/ARDSettingsStore.h
index b010b7f1242fade7d18191a31b9399c7217689e5..3dd0f6431b39d8474cc43e4752d658331f7d64f6 100644
--- a/webrtc/examples/objc/AppRTCMobile/ARDSettingsStore.h
+++ b/webrtc/examples/objc/AppRTCMobile/ARDSettingsStore.h
@@ -19,20 +19,10 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @interface ARDSettingsStore : NSObject
 
+@property(nonatomic) NSString *videoResolution;
 @property(nonatomic) NSString *videoCodec;
 
 /**
- * Returns current video resolution media constraint string stored in the store.
- */
-- (nullable NSString *)videoResolutionConstraints;
-
-/**
- * Stores the provided value as video resolution media constraint.
- * @param value the string to be stored
- */
-- (void)setVideoResolutionConstraints:(NSString *)value;
-
-/**
  * Returns current max bitrate number stored in the store.
  */
 - (nullable NSNumber *)maxBitrate;