Add VR Hal target test.

Bug: 32022964
Test:  vts-tradefed
Change-Id: If1ae2b3df7ee083b5a0855d883368aefd244531a
diff --git a/vr/1.0/vts/Android.mk b/vr/1.0/vts/Android.mk
index 12f0175..8a1312d 100644
--- a/vr/1.0/vts/Android.mk
+++ b/vr/1.0/vts/Android.mk
@@ -76,3 +76,5 @@
 
 include $(BUILD_SHARED_LIBRARY)
 
+# include hidl test makefiles
+include $(LOCAL_PATH)/functional/vts/testcases/hal/vr/hidl/Android.mk