Update lock icon view when biometrics cleared

To ensure when face auth is the only biometric
enrolled, that the unlocked icon immediately
becomes the locked icon on screen off (when
biometrics authentication states are cleared).

Also add the unlocked => locked icon transition
so there isn't a jump-cut animation when
AoD is enabled and the unlocked icon transitions
to the locked icon.

Fixes: 264217642
Test: manual
 1. enroll face auth only without bypass enabled
 2. unlock the lock screen (see unlocked icon)
 3. let the screen timeout
 4. tap screen to wakeup
 Observe: lock icon (not unlocked icon)
Test: atest LockIconViewControllerTest
Change-Id: I317725fee4519ad0af39a1a7ade0361263643902