Port PresenceHandler to async/await

changelog.d/6991.misc

@@ -0,0 +1 @@
+Port `synapse.handlers.presence` to async/await.

synapse/handlers/message.py

@@ -1016,11 +1016,10 @@ def _notify():
             # matters as sometimes presence code can take a while.
             run_in_background(self._bump_active_time, requester.user)
 
-    @defer.inlineCallbacks
-    def _bump_active_time(self, user):
+    async def _bump_active_time(self, user):
         try:
             presence = self.hs.get_presence_handler()
-            yield presence.bump_presence_active_time(user)
+            await presence.bump_presence_active_time(user)
         except Exception:
             logger.exception("Error bumping presence active time")