Move goldfish RRO to vendor partition

Change PRODUCT_PACKAGE_OVERLAYS to DEVICE_PACKAGE_OVERLAYS so that
goldfish RROs are not pulled into GSI.
This moves the goldfish configs to vendor partition, and since GSI
doesn't include a vendor, this means GSI won't include the goldfish
configs.

Bug: 174816040
Test: Presubmit
Change-Id: Ia3b4ca5fbf23278e55f1f200c9b96568d8d03606
diff --git a/target/product/emulator_vendor.mk b/target/product/emulator_vendor.mk
index 89c3f3a..4d46358 100644
--- a/target/product/emulator_vendor.mk
+++ b/target/product/emulator_vendor.mk
@@ -26,7 +26,7 @@
 PRODUCT_PACKAGES += \
     vndk-sp
 
-PRODUCT_PACKAGE_OVERLAYS := device/generic/goldfish/overlay
+DEVICE_PACKAGE_OVERLAYS := device/generic/goldfish/overlay
 
 PRODUCT_CHARACTERISTICS := emulator