Fix callback and async (#31281)

* Fix callback and async

* Fix a return

* Fix test

* Fix mqtt tests

* Fix some more callbacks

homeassistant/components/homekit_controller/light.py

@@ -12,6 +12,7 @@ from homeassistant.components.light import (
     SUPPORT_COLOR_TEMP,
     Light,
 )
+from homeassistant.core import callback
 
 from . import KNOWN_DEVICES, HomeKitEntity
 
@@ -23,6 +24,7 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
     hkid = config_entry.data["AccessoryPairingID"]
     conn = hass.data[KNOWN_DEVICES][hkid]
 
+    @callback
     def async_add_service(aid, service):
         if service["stype"] != "lightbulb":
             return False