Don't update the alternate bouncer on unlocked change

That callback happens too early and may cause the alternate
bouncer to hide before the biometric unlock controller
has a chance to act upon the alternate bouncer visible state.

This was initially removed to fix b/289909028 but was mistakenly
brought back (in a merge-conflict resolve).

Fixes: 296178710
Test: manual (use face auth to authenticate from a notification
press on the LS when FP is also enrolled)
Test: atest StatusBarKeyguardViewManagerTest

Change-Id: I243db2619867ed66db0f5c282f3c3c3168af2813