config: props: Set default wifi country code

* To 00
* Make it overridable

Change-Id: I2025fc927363baf547b36ecd6ebe9c7fbc4d7611

config/common.mk

@@ -220,10 +220,14 @@ PRODUCT_PACKAGES += \
 
 ifeq ($(WITH_GMS),false)
 # Storage manager
-PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
+PRODUCT_SYSTEM_PROPERTIES += \
     ro.storage_manager.enabled=true
 endif
 
+# Default wifi country code
+PRODUCT_SYSTEM_PROPERTIES += \
+    ro.boot.wificountrycode?=00
+
 # These packages are excluded from user builds
 PRODUCT_PACKAGES_DEBUG += \
     procmem