Install runtime resource overlay without subdir.

Runtime resource overlay is a bare APK with just the overlaid
resources. There is no need for additional subdir.
See http://go/sku-colors.

Bug: 31692079
Change-Id: Iff3d58f941e764a7be3ec04cafeefd592bd8b944
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 6722af4..6fc2935 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -210,7 +210,10 @@
   # Apk and its attachments reside in its own subdir.
   ifeq ($(LOCAL_MODULE_CLASS),APPS)
   # framework-res.apk doesn't like the additional layer.
-  ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
+  ifeq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
+  # Neither do Runtime Resource Overlay apks, which contain just the overlaid resources.
+  else ifeq ($(LOCAL_IS_RUNTIME_RESOURCE_OVERLAY),true)
+  else
     my_module_path := $(my_module_path)/$(LOCAL_MODULE)
   endif
   endif