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 am: 278103aa

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



Change-Id: If4557e8d11ba5a37a01591a5e6af4b4469fd7bd4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>