Cleanup and simplitfy the async state update (#9390)

* Cleanup and simplitfy the async state update

* Update test_entity.py

homeassistant/components/binary_sensor/alarmdecoder.py

@@ -102,11 +102,11 @@ class AlarmDecoderBinarySensor(BinarySensorDevice):
         """Update the zone's state, if needed."""
         if zone is None or int(zone) == self._zone_number:
             self._state = 1
-            self.hass.async_add_job(self.async_update_ha_state())
+            self.async_schedule_update_ha_state()
 
     @callback
     def _restore_callback(self, zone):
         """Update the zone's state, if needed."""
         if zone is None or int(zone) == self._zone_number:
             self._state = 0
-            self.hass.async_add_job(self.async_update_ha_state())
+            self.async_schedule_update_ha_state()