zenfone7: set vndk version 30

Change-Id: I67c80fcc2ebe20f1b8cfc4d3121ec40ff7b62222
diff --git a/device.mk b/device.mk
index 42d6ebb..1feb5e9 100755
--- a/device.mk
+++ b/device.mk
@@ -21,7 +21,7 @@
 #
 
 # VNDK
-PRODUCT_TARGET_VNDK_VERSION := 29
+PRODUCT_TARGET_VNDK_VERSION := 30
 
 # Overlays
 DEVICE_PACKAGE_OVERLAYS += \