zenfone8: add UDFPS extension

Mark pressed fingerprint layer.

Change-Id: I49891f89350839ff93ff1a762a83996bfd56ec18
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 1d77674..0e47288 100755
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -55,6 +55,9 @@
 # Bluetooth
 BOARD_BLUETOOTH_BDROID_BUILDCFG_INCLUDE_DIR := $(DEVICE_PATH)/bluetooth
 
+# Biometrics
+TARGET_SURFACEFLINGER_UDFPS_LIB := //$(DEVICE_PATH):libudfps_extension.sake
+
 # Bootloader
 TARGET_BOOTLOADER_BOARD_NAME := lahaina
 TARGET_NO_BOOTLOADER := true