[RN] Fix audio / video mute buttons when permissions are not granted

react/features/toolbox/functions.native.js

 
 import { appNavigate } from '../app';
 import { toggleAudioMuted, toggleVideoMuted } from '../base/media';
+import { getLocalAudioTrack, getLocalVideoTrack } from '../base/tracks';
 
 /**
  * Maps (redux) actions to React component props.
  * }}
  */
 export function abstractMapStateToProps(state: Object): Object {
-    const media = state['features/base/media'];
+    const tracks = state['features/base/tracks'];
     const { visible } = state['features/toolbox'];
 
+    const audioTrack = getLocalAudioTrack(tracks);
+    const videoTrack = getLocalVideoTrack(tracks);
+
     return {
         /**
          * Flag showing that audio is muted.
          * @protected
          * @type {boolean}
          */
-        _audioMuted: media.audio.muted,
+        _audioMuted: !audioTrack || audioTrack.muted,
 
         /**
          * Flag showing whether video is muted.
          * @protected
          * @type {boolean}
          */
-        _videoMuted: media.video.muted,
+        _videoMuted: !videoTrack || videoTrack.muted,
 
         /**
          * Flag showing whether toolbox is visible.