Add hostapd_test_utils helper methods for the am: 3454ce17 am: b3a1c626...

Add hostapd_test_utils helper methods for the am: 3454ce17 am: b3a1c626 am: a611e7e1 am: 13892d86

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/24589589



Change-Id: I7a8e4a44fbce89ba71d55fbb9dcdb5b43900f5d6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>