Secretkeeper implementation: in-HAL/nonsecure impl am: eb223ba883

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

Change-Id: I874cf08c7331fbb91653f54be29f831e109e4c6d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>