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

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

Change-Id: I110bc87b44969847dc5dbcc3b778053247a2bc10