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

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

Change-Id: Iaf833a5d576accb0fa104ce0e235e1c96b33c398
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>