fix(conference.js): add tracks to the conference

conference.js

     lockStateChanged,
     onStartMutedPolicyChanged,
     p2pStatusChanged,
-    sendLocalParticipant
+    sendLocalParticipant,
+    _conferenceWillJoin
 } from './react/features/base/conference';
 import { getReplaceParticipant } from './react/features/base/config/functions';
 import {
                 APP.conference.roomName,
                 this._getConferenceOptions());
 
-        APP.store.dispatch(conferenceWillJoin(room));
-
         // Filter out the tracks that are muted (except on mobile Safari).
         const tracks = isIosMobileBrowser() ? localTracks : localTracks.filter(track => !track.isMuted());
 
         this._setLocalAudioVideoStreams(tracks);
         this._room = room; // FIXME do not use this
 
+        APP.store.dispatch(_conferenceWillJoin(room));
+
         sendLocalParticipant(APP.store, room);
 
         this._setupListeners();

react/features/base/conference/actions.js

  * the local participant will (try to) join.
  * @returns {Function}
  */
-function _conferenceWillJoin(conference: Object) {
+export function _conferenceWillJoin(conference: Object) {
     return (dispatch: Dispatch<any>, getState: Function) => {
         const localTracks
             = getLocalTracks(getState()['features/base/tracks'])