Merge "Secretkeeper: add message encryption" into main am: 57b7d0bc am: e0563a32 am: 55a875cd

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2847414



Change-Id: Ibd420dd8f8c9b13211321a52336df2d278e0bac6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>