Do not try to bypass when triaging notifications

We should not try to authenticate on the background after the
user pulls down the notification shade, since we'll be stuck
on a loop, always requesting new auth.

Fixes: 136291835
Test: atest KeyguardUpdateMonitorTest
Test: pull down shade with bypass and notice no repeated auth
Test: bypass from lock screen
Change-Id: Ic850f223bcfe548acd70c1a9c68c2cfead30662d