Order awakening from dream after unlocking.

This changelist ensures that the keyguard is unlocked before awakening
from a dream in the BiometricUnlockController.

Test: atest BiometricsUnlockControllerTest#onSideFingerprintSuccess_dreaming_unlockThenWake
Fixes: 289861878
Change-Id: I3ba4478e7f26a77ef7d3e3be380e75e7c197edc2
Merged-In: I3ba4478e7f26a77ef7d3e3be380e75e7c197edc2