Use the Context name to publish and use vrmanager

Bug: 34736524
Test: build
Change-Id: I8aabb4d242fb2378b24dd30a972c382a7f8f4934
diff --git a/services/core/java/com/android/server/UiModeManagerService.java b/services/core/java/com/android/server/UiModeManagerService.java
index 6f2f2c4..acacb9e 100644
--- a/services/core/java/com/android/server/UiModeManagerService.java
+++ b/services/core/java/com/android/server/UiModeManagerService.java
@@ -772,7 +772,8 @@
     }
 
     private void registerVrStateListener() {
-        IVrManager vrManager = IVrManager.Stub.asInterface(ServiceManager.getService("vrmanager"));
+        IVrManager vrManager = IVrManager.Stub.asInterface(ServiceManager.getService(
+                Context.VR_SERVICE));
         try {
             if (vrManager != null) {
                 vrManager.registerListener(mVrStateCallbacks);