libhardware: make vr vendor only

Limit AOSP usage of historical HAL implementation interface to
avoid mistakes.

Bug: 37280010
Test: build
Change-Id: Ia97aaa2c833edfd4db30cc0ec5c89033bb70cd76
diff --git a/include/hardware/vr.h b/include/hardware/vr.h
deleted file mode 120000
index fb20991..0000000
--- a/include/hardware/vr.h
+++ /dev/null
@@ -1 +0,0 @@
-../../include_all/hardware/vr.h
\ No newline at end of file
diff --git a/include_all/hardware/vr.h b/include_vendor/hardware/vr.h
similarity index 100%
rename from include_all/hardware/vr.h
rename to include_vendor/hardware/vr.h