Merge "KeyMint HAL: clarify leaf cert requirements" am: 824c5d8f60 am: ac42d60136

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2154073

Change-Id: I953b8bc539caf13d4d08430c8a57989ca7a9e957
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>