remote-settings: Mark service as running when using private bus

When using a private bus connection, the service is never marked
as running when settings are initialized asynchronously. Successfully
opening a socket in NM's runtime directory should already imply
a running service, so just mark it as such (as we already do in
the synchronous path).

libnm-glib/nm-remote-settings.c

@@ -1363,9 +1363,10 @@ init_async (GAsyncInitable *initable, int io_priority,
 	init_data->result = g_simple_async_result_new (G_OBJECT (initable), callback,
 	                                               user_data, init_async);
 
-	if (priv->private_bus)
+	if (priv->private_bus) {
+		priv->service_running = TRUE;
 		init_get_properties (init_data);
-	else {
+	} else {
 		/* Check if NM is running */
 		dbus_g_proxy_begin_call (priv->dbus_proxy, "NameHasOwner",
 		                         init_async_got_manager_running,