Introduce Secretkeeper HAL interface am: 18cafa0a11 am: 5d668c50ec

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2695089

Change-Id: I0580a55379c34c1954da9758d86bbc594c835f55
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>