VTS - avoid same MAC for AP and STA

Having the AP and STA set the same MAC address in tests could cause
unintended failures when WifiApIfaceHidlTest and WifiStaIfaceHidlTest
are executed back to back.

Bug: 172528120
Test: atest VtsHalWifiApV1_4TargetTest VtsHalWifiV1_2TargetTest

Change-Id: I336d21cd896c46b064f16ecfa184a26dab67deaa
1 file changed