Merge "Rewrite RKP readme in terms of DICE" am: 139b663e38 am: e8821b0fd6 am: aae23ac225 am: 7589384303 am: 6c76cf7c41

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2597060

Change-Id: Ie2e28e72f5808a2aea161483b2d7e5a394736b4b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>