Fix face auth from bouncer over dream

When passive auth is triggered by swiping up the bouncer on top of the
dream, we should wake and unlock the the device.

Flag: android.service.dreams.dreams_v2
Test: atest BiometricsUnlockControllerTest
Fixes: 404585041
Change-Id: I95b2beaa905b34ecb0b972fbcf54102d24e40531