zenfone6: Enabled updateable APEX

Change-Id: Iae46cbf48ae5fbfa100e83e8d6ce19f225102cf3
diff --git a/device.mk b/device.mk
index c93a558..0aaa15c 100755
--- a/device.mk
+++ b/device.mk
@@ -22,6 +22,9 @@
 $(call inherit-product, vendor/asus/zenfone6/zenfone6-vendor.mk)
 $(call inherit-product-if-exists, vendor/gapps/arm64/arm64-vendor.mk)
 
+# Enable updating of APEXes
+$(call inherit-product, $(SRC_TARGET_DIR)/product/updatable_apex.mk)
+
 #from build treble includes
 PRODUCT_COPY_FILES += \
     system/core/rootdir/init.zygote64_32.rc:root/init.zygote64_32.rc \