Secretkeeper implementation: in-HAL/nonsecure impl am: eb223ba883 am: 76e967125d am: e0e6799d72

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2797756

Change-Id: Ic9a4f5eafa70b942e224b057e7555aea092eff1b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>