Fire onConnect event when connection established

In the SocketIOClient, `onConnect()` never called `mHandler.onConnect()`

Author: bkase

src/com/codebutler/android_websockets/SocketIOClient.java

@@ -169,6 +169,7 @@ public void run() {
                         mClient.send("2:::");
                     }
                 }, mHeartbeat);
+                mHandler.onConnect();
             }
         }, null);
         mClient.connect();