Fix base class of WifiHidlEnvironment_1_2

WifiHidlEnvironment_1_2 inherits WifiHidlEnvironment so that it stops
Wifi before every test.

Test: run vts -m VtsHalWifiV1_2Target
Bug: 112058501
Change-Id: I73c50351fa486f2ae7749e43a060ff05672c0f65
1 file changed