Add "for work" in work profile biometrics string

JUSTIFICATION: Around 8 users reporting this issue in b/271250248
RISK: This change is a cherrypick from a fix already made in Android U where no issue has been reported after a few months.
Bug: 271250248
Test: manually tested
Change-Id: Ib16b2d045f4695883276749fcce6ccce60688c09
(cherry picked from commit a9231555)