Merge "Update Keymint documentation in aidl." am: 0a8dd959a4 am: 38e3dc200a am: da0bd640f1

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1673780

Change-Id: I952ac26526b4af1936c133e4a6a812af11b38770