AOD - Burn in adjustments

Move both the clock and keyguard slice area towards the middle for x
adjustments, and retain the current Y adjustments.

Bug: 172360102
Test: follow burn in instructions here:
/frameworks/base/packages/SystemUI/docs/clock-plugins.md

Change-Id: Id22d777724bf9be58758b1a2b260a7933af8e999
6 files changed