Merge "biometric: Add nullable to api for crypto" into main am: 6fff31bf3f am: 4175089259

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2784169

Change-Id: Ie38c9aac9a8bfe7dbda5c38bb8a3cf0fbcc8e88d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>