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: 54487d90 am: e31805bd

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



Change-Id: I137cfaaa876e93898b32562e7d1b61587196f29d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>