improve reconnection for conference (#77)

* improve reconnection for conference

* minor unittest fix

* simplfy code

* fix network thread related crash, improve conference reconnection logic

---------

Co-authored-by: lastpeony <[email protected]>

Author: lastpeony

webrtc-android-framework/src/main/java/io/antmedia/webrtcandroidframework/api/DefaultConferenceWebRTCListener.java

@@ -51,9 +51,9 @@ public void onPublishStarted(String streamId) {
         if (publishReconnecting) {
             publishReconnecting = false;
         }
-        else if (!playStarted) {
-            webRTCClient.play(roomId);
-        }
+
+        webRTCClient.play(roomId);
+
     }
 
     @Override