Fix fingerprint navigation after entering lockout.

The code was leaving the fingerprint driver in an authenticating state,
which means the sensor will continue looking for a fingerprint and
not enter navigation mode. The fix stops fingerprint when we
detect the lockout state.

Test: manual

Fixes bug 36103875

Change-Id: Ic8dc04e0acb731e19a5f4c6824a61c80bdbbb2c4