Support smooth notification reveal...

...when the user has chosen not to see notifs on
the lockscreen, pulls down the shade, is prompted
to unlock, and then unlocks. There is a built-in
notif animation for this. Immediately set max
notifications to reveal all when unlocked in this
way.

Fixes: 329195944
Test: atest BouncerToGoneFlowsTest
Flag: ACONFIG com.android.systemui.migrate_clocks_to_blueprint
TEAMFOOD

Change-Id: I3a618e756b69b1f4e1bce371d3f97bf202d83b00