Merge "Update biometric constant docs from tier to class" into rvc-dev am:...

Merge "Update biometric constant docs from tier to class" into rvc-dev am: 29d2bf12 am: 9512587f am: 8a69ae04 am: e333c9be

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11840347

Change-Id: I892c45e83a702eac26bea2531bbb7f848af1963b