Support face unlock for PS if class2 biometric and above

With this change it is checked if face unlock is supported as a class2
or class3 biometrics on the device.
If face is convenience biometrics then face unlock for
private space controller is not added.

Bug: 329044103
Test: atest UtilsTest and verified Face unlock is not added if face is convenience
Change-Id: I6e1a6557774be1173ad3ee7ff7b14d51f9fe1716