Allow vrmanager to connect to vr_window_manager.

The vrmanager system service connects to vr_window_manager to
provide access to controller data for 2d embedding. This is
intended to be removed when the relevant parts of vr_window_manager
are moved into VrCore (b/36506799).

Bug: 35619424
Test: manual on device
Change-Id: I9c645882bf1a14a85bbc4c2312164381b23aaa54

private/system_server.te

@@ -500,6 +500,8 @@ allow system_server netd_service:service_manager find;
 allow system_server nfc_service:service_manager find;
 allow system_server radio_service:service_manager find;
 allow system_server surfaceflinger_service:service_manager find;
+# TODO(b/36506799): move vr_wm code to VrCore and remove this:
+allow system_server vr_window_manager_service:service_manager find;
 allow system_server wificond_service:service_manager find;
 
 allow system_server keystore:keystore_key {