Merge "Clarify Secretkeeper comments" into main am: 99cf8471 am: 5605362e

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2885127



Change-Id: I18dd3b8ff043e2ab2b0bacbb2814b36a9d0bbd65
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>