service: Signal when services are moved

When calling MoveBefore or MoveAfter on a service, no signal is emitted
by ConnMan. This makes it impossible for a D-Bus client to maintain an
ordered list of services in sync with ConnMan.

This patch schedules the emission of the signal ServicesChanged from the
function move_service(), so the new list will get published over D-Bus.

connman/src/service.c

@@ -5753,6 +5753,8 @@ static DBusMessage *move_service(DBusConnection *conn,
 
 	__connman_connection_update_gateway();
 
+	service_schedule_changed();
+
 	return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 }