Add Wifi HAL to get factory MAC address

Add getFactoryMacAddress method to retrieve the factory MAC of Sta
interface.

Bug: 111634904
Test: Manual Verification
Test: run vts with command "mma -j64 && adb sync data && adb shell data/nativetest64/VtsHalWifiV1_3TargetTest/VtsHalWifiV1_3TargetTest"
Change-Id: I82b47366d3576201ef54a4e89a3f864c31fff42c