Fix up the calls to the notifier for device messages

synapse/app/synchrotron.py

@@ -399,6 +399,9 @@ class SynchrotronServer(HomeServer):
             notify_from_stream(
                 result, "typing", "typing_key", room="room_id"
             )
+            notify_from_stream(
+                result, "to_device", "to_device_key", user="user_id"
+            )
 
         while True:
             try:

synapse/rest/client/v2_alpha/sendtodevice.py

@@ -78,7 +78,7 @@ class SendToDeviceRestServlet(servlet.RestServlet):
         stream_id = yield self.store.add_messages_to_device_inbox(local_messages)
 
         self.notifier.on_new_event(
-            "to_device", stream_id, users=local_messages.keys()
+            "to_device_key", stream_id, users=local_messages.keys()
         )
 
         response = (200, {})