Merge "Clarify Secretkeeper comments" into main am: 99cf847175 am: 5605362e10 am: e0ef257a9c

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

Change-Id: I55203e8f170b139cb73769efde17db846bc74bf7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>