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

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

Change-Id: I61517210634225747eda3f60ff1da25bc3616095
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>