feat(events): include JitsiTrack as an argument of TRACK_MUTE_CHANGED

modules/RTC/JitsiLocalTrack.js

@@ -340,7 +340,7 @@ JitsiLocalTrack.prototype._setMute = function (mute) {
             return self._sendMuteStatus(mute);
         })
         .then(function() {
-            self.eventEmitter.emit(JitsiTrackEvents.TRACK_MUTE_CHANGED);
+            self.eventEmitter.emit(JitsiTrackEvents.TRACK_MUTE_CHANGED, this);
         });
 };
 

modules/RTC/JitsiRemoteTrack.js

@@ -85,7 +85,7 @@ JitsiRemoteTrack.prototype.setMute = function (value) {
         this.stream.muted = value;
 
     this.muted = value;
-    this.eventEmitter.emit(JitsiTrackEvents.TRACK_MUTE_CHANGED);
+    this.eventEmitter.emit(JitsiTrackEvents.TRACK_MUTE_CHANGED, this);
 };
 
 /**