Add a property used to enable Vulkan as default render pipeline

Bug: 119267168
Test: Booted pixel 3 with Vulkan rendering
Change-Id: I09810131c018f75ef3654e23d3390535c6a06b3f
diff --git a/core/Makefile b/core/Makefile
index 4eb04a6..28430e0 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -473,6 +473,7 @@
 	$(hide) echo ro.vendor.product.cpu.abilist64="$(TARGET_CPU_ABI_LIST_64_BIT)">>$@
 	$(hide) echo ro.product.board="$(TARGET_BOOTLOADER_BOARD_NAME)">>$@
 	$(hide) echo ro.board.platform="$(TARGET_BOARD_PLATFORM)">>$@
+	$(hide) echo ro.hwui.use_vulkan="$(TARGET_USES_VULKAN)">>$@
 	$(hide) $(call generate-common-build-props,vendor,$@)
 ifdef property_overrides_split_enabled
 	$(hide) echo "#" >> $@; \