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

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



Change-Id: I1a3753e52125acb778534c66c92d09770eaaa636
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>