Biometric auth keyguard adjustments

- During passive authentication, the keyguard should not be dismissed
because the user might be looking at notifications.
- Keyguard should still be dismissed if bouncer was visible.
- Some sensors are allowed to trigger biometrics auth

Change-Id: Iff492c5e1eb807ab3b9b187a376c4db975606b5a
Fixes: 123581946
Fixes: 123364930
Test: fake bio unlock from (lock screen, bouncer)
Test: fingerprint unlock from LS, bouncer, AOD
Test: atest BiometricsUnlockControllerTest
Test: atest StatusBarTest
Test: atest KeyguardUpdateMonitorTest