Use the hostapd_test_utils helper methods in am: c6cacf61

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



Change-Id: I86512173793766d364453d9b99fd47d75f7c0487
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>