wifi(vts): Precondition AP tests on existence of hostapd HAL am: 274eadd581 am: facaf07418 am: 1c0b3ad440 am: 3ce226c8a9

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1857796

Change-Id: I52ede94cb8e0099d46ed13f6d97e827b6e9d063c