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: 1539083a am: 61ae6416 am: ae1b183f

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



Change-Id: Iaa1a99796482ff9c8749f7af7e909e9aaf681061
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>