[Secretkeeper] In-memory KeyValueStore am: 2759df0d3c am: 5c86cf8553 am: cdc5b14ab8

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2847554

Change-Id: I9d04dba126fb1b17d2992c53970c5b2829295ea7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>