Adds event that is fired when the local user have started muted

JitsiConference.js

                     track.mute();
                 }
             });
+
+            conference.eventEmitter.emit(JitsiConferenceEvents.STARTED_MUTED);
         });
 
     conference.room.addPresenceListener("startmuted", function (data, from) {

JitsiConferenceEvents.js

      * Indicates that start muted settings changed.
      */
     START_MUTED_POLICY_CHANGED: "conference.start_muted_policy_changed",
+    /**
+     * Indicates that the local user has started muted.
+     */
+    STARTED_MUTED: "conference.started_muted",
     /**
      * Indicates that DTMF support changed.
      */

doc/API.md

         - CONFERENCE_FAILED - notifies that user failed to join the conference. (parameters - errorCode(JitsiMeetJS.errors.conference))
         - KICKED - notifies that user has been kicked from the conference.
         - START_MUTED_POLICY_CHANGED - notifies that all new participants will join with muted audio/video stream (parameters - JS object with 2 properties - audio(boolean), video(boolean))
+        - STARTED_MUTED - notifies that the local user has started muted
 
     2. connection
         - CONNECTION_FAILED - indicates that the server connection failed.

lib-jitsi-meet.js

                     track.mute();
                 }
             });
+
+            conference.eventEmitter.emit(JitsiConferenceEvents.STARTED_MUTED);
         });
 
     conference.room.addPresenceListener("startmuted", function (data, from) {
      * Indicates that start muted settings changed.
      */
     START_MUTED_POLICY_CHANGED: "conference.start_muted_policy_changed",
+    /**
+     * Indicates that the local user has started muted.
+     */
+    STARTED_MUTED: "conference.started_muted",
     /**
      * Indicates that DTMF support changed.
      */