Allow udfps when strong auth is required

Only disallow UDFPS usage if the device is
in lockdown or reboot. Otherwise, (for reasons like TIMEOUT), we
allow the user to use fingerprint to authenticate.

Test: manual
Test: atest KeyguardUpdateMonitorTest
Fixes: 205556311
Change-Id: Ia7e56b7d9b857a76036161cbd6edd981bed3bb6c
Merged-In: Ia7e56b7d9b857a76036161cbd6edd981bed3bb6c
(cherry picked from commit 83dd25e7)