Use the hostapd_test_utils helper methods in am: c6cacf6149 am: b2d1a3b4c7 am: 12e28a2bce

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/24589850

Change-Id: I85d9f37d0222bbe77fbcd5e8a592ab12d83d9c65
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>