feat(RN): don't use local O/A for mute on React Native

With the update of react-native-webrtc to M67, the ability to stop the camera
when a track is disabled was introduced, so there is no longer a need for doing
a local O/A to remove the track for video muting.

modules/browser/BrowserCapabilities.js

         return !(
             this.isFirefox()
             || this.isEdge()
+            || this.isReactNative()
             || this.isSafariWithWebrtc()
         );
     }