emulator: enable cfi for emulator's wifi driver

Since the wpa_supplicant_8 has enabled cfi, the
static lib that it uses should enable cfi, otherwise
there will be runtime crashes.

BUG: 169343095
Test:
lunch sdk_phone_arm64-userdebug
m -j
run the image on the aarch64-linux host
hostapd_nohidl and wpa_supplicant should
not crash with cfi failures.

Change-Id: I00e3840032530ee62aac69cab0b54755f83291f9