Added should_poll = False to universal media player

homeassistant/components/media_player/universal.py

@@ -191,6 +191,11 @@ class UniversalMediaPlayer(MediaPlayerDevice):
         self.hass.services.call(DOMAIN, service_name, service_data,
                                 blocking=True)
 
+    @property
+    def should_poll(self):
+        """ Indicates whether HA should poll for updates """
+        return False
+
     @property
     def dependencies(self):
         """ List of entity ids of entities that the mp depends on for state """