Add interface info to .rc files

Signed-off-by: Felix <google@ix5.org>
Change-Id: I6d70bbdb66c3dce280bf6908c3750316a6f6cf70
diff --git a/vr/1.0/default/android.hardware.vr@1.0-service.rc b/vr/1.0/default/android.hardware.vr@1.0-service.rc
index fc4934c..5486674 100644
--- a/vr/1.0/default/android.hardware.vr@1.0-service.rc
+++ b/vr/1.0/default/android.hardware.vr@1.0-service.rc
@@ -1,4 +1,5 @@
 service vendor.vr-1-0 /vendor/bin/hw/android.hardware.vr@1.0-service
+    interface android.hardware.vr@1.0::IVr default
     class hal
     user system
     group system