Merge "IFingerprint: update comments" into sc-dev am: b09f62d6a6 am: 9eeff5b010

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15159443

Change-Id: If38b2a274cdcb7a3387fd307f3de8e9b101c367c