Remove unneeded code that supported old UI

Fixes: 276348149
Test: atest LockIconViewControllerTest
Test: manually check that udfps and lock icon
shows appropriately for transitions between
AOD <-> lock screen and home screen <-> AoD
and home screen <-> lock screen

Change-Id: I4e385e87d06ad04ddccdaf2de49ab42773752385
2 files changed