Show bouncer when unlocking and not interactive

We cannot dismiss the bouncer when the device cannot be unlocked,
otherwise we'll be stuck looking since gatekeeper is not unlocked.

Test: face auth from AOD2 encrypted
Test: face auth from lock screen encrypted
Test: face auth from AOD2
Test: atest BiometricsUnlockControllerTest
Fixes: 138093575
Change-Id: I5c5b89ee9fa1a10cedceaf1ab227e26910beed2a