Merge "Add a README for Remote Key Provisioning." into tm-dev am: 8c1586bc4f

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/18635577

Change-Id: Ic9d4911f335bc1e37651ec73bd1b231c7f180979
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>