Revert "Fix sysui studio build"

This reverts commit f748ce3ffa.

Reason for revert: b/279381881

Change-Id: I1c69c71115a44fbba7d368486d4a2595093bd15e

packages/SystemUI/src/com/android/systemui/dagger/FrameworkServicesModule.java

@@ -277,6 +277,7 @@ public class FrameworkServicesModule {
 
     @Provides
     @Singleton
+    @Nullable
     static IVrManager provideIVrManager() {
         return IVrManager.Stub.asInterface(ServiceManager.getService(Context.VR_SERVICE));
     }