Add null check for vrManager

If VrManagerService is not started, vrManager will be null. Need
add check for it.

Test: system works fine whether device supports VR or not
Bug: 112064298
Change-Id: I924956234d9cd520e272a961b2939890164db1a5
diff --git a/services/core/java/com/android/server/HardwarePropertiesManagerService.java b/services/core/java/com/android/server/HardwarePropertiesManagerService.java
index 4016d29..e21a3d7 100644
--- a/services/core/java/com/android/server/HardwarePropertiesManagerService.java
+++ b/services/core/java/com/android/server/HardwarePropertiesManagerService.java
@@ -26,7 +26,6 @@
 import static android.os.HardwarePropertiesManager.TEMPERATURE_THROTTLING_BELOW_VR_MIN;
 
 import android.Manifest;
-import android.app.ActivityManager;
 import android.app.AppOpsManager;
 import android.app.admin.DevicePolicyManager;
 import android.content.Context;
@@ -34,8 +33,8 @@
 import android.os.Binder;
 import android.os.CpuUsageInfo;
 import android.os.IHardwarePropertiesManager;
-import android.os.Process;
 import android.os.UserHandle;
+
 import com.android.internal.util.DumpUtils;
 import com.android.server.vr.VrManagerInternal;
 
@@ -166,11 +165,11 @@
         final VrManagerInternal vrService = LocalServices.getService(VrManagerInternal.class);
         final DevicePolicyManager dpm = mContext.getSystemService(DevicePolicyManager.class);
         if (!dpm.isDeviceOwnerApp(callingPackage)
-                && !vrService.isCurrentVrListener(callingPackage, userId)
                 && mContext.checkCallingOrSelfPermission(Manifest.permission.DEVICE_POWER)
-                        != PackageManager.PERMISSION_GRANTED) {
-            throw new SecurityException("The caller is not a device owner, bound VrListenerService"
-                + ", or holding the DEVICE_POWER permission.");
+                        != PackageManager.PERMISSION_GRANTED
+                && (vrService == null || !vrService.isCurrentVrListener(callingPackage, userId))) {
+            throw new SecurityException("The caller is neither a device owner"
+                + ", nor holding the DEVICE_POWER permission, nor the current VrListener.");
         }
     }
 }