fix(JitsiLocalTrack): no data event fired before ICE connected

We can not assume that the audio source is not sending any data based
on the stat until the media connection has not been established.

modules/RTC/JitsiLocalTrack.js

  */
 JitsiLocalTrack.prototype._setByteSent = function (bytesSent) {
     this._bytesSent = bytesSent;
-    if(this._testByteSent) {
+    // FIXME it's a shame that PeerConnection and ICE status does not belong
+    // to the RTC module and it has to be accessed through
+    // the conference(and through the XMPP chat room ???) instead
+    let iceConnectionState
+        = this.conference ? this.conference.getConnectionState() : null;
+    if(this._testByteSent && "connected" === iceConnectionState) {
         setTimeout(function () {
             if(this._bytesSent <= 0){
                 //we are not receiving anything from the microphone