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
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6d93228c0e39299b8efde1ed8d0175328b0f0269)
Merged-In: I3ba4478e7f26a77ef7d3e3be380e75e7c197edc2
Change-Id: I3ba4478e7f26a77ef7d3e3be380e75e7c197edc2