Use the hostapd_test_utils helper methods in am: c6cacf6149 am: b2d1a3b4c7 am: 7cba7ad847

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

Change-Id: I165f06d16bb4db7d45dc6ee886b581bfc1830ed4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>