Add builder method to check DevicePolicyManager

This is a hidden method and BiometricService will enforce
that 3rd party applications cannot use it.

Fixes: 142966163
Test: Verified disabling fingerprint will not allow
the user to unlock work apps with fingerprint. (But can use fingeprint
within apps.)
Test: Verified disabling face and/or iris on a fingerprint device will
continue to
allow the user to unlock work apps with fingerprint.
Test: Verified disabling face on a face authentication device
will not allow the user to unlock work apps with face authentication.
(But can use face
authentication within apps.)
Test: Verified disabling fingerprint and/or iris on a face
authentication device will continue to allow the user to unlock work
apps with face authentication.

Change-Id: I21ae00d0993d78a641cb8c5d8af2dd02be0b4a21