fix(audio-only) Do not create a new track for audio-only changes.

Now that screenshare is permitted when a user is in audio-only mode, do not create a new video track if it doesn't exist when audio-only mode is automatically disabled. New tracks should only be prompted by user action such a camera unmute or start screenshare. Fixes https://github.com/jitsi/jitsi-meet/issues/11460.

conference.js

@@ -2617,7 +2617,8 @@ export default {
                         track => track.jitsiTrack
                             && track.jitsiTrack.getType() === 'video'));
 
-            if (!isTrackInRedux) {
+
+            if (isTrackInRedux) {
                 this.muteVideo(audioOnly);
             }