[automerger skipped] Add unit test coverage for unlock attempts in TrustTests am: d0ac74be7e -s ours

am skip reason: Merged-In I1c8eaacc9c20284ef2783bcd65c14f68b0b444e8 with SHA-1 45ca5feb11 is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3163341

Change-Id: Ie1d0c51e34f7d9d10ee0d3711dc1c159c4c9401c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>