[automerger skipped] [DO NOT MERGE] Add centralized DisplayTracker for SystemUI am: f8999b1dda am: 9b657f255c -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20933129

Change-Id: Id9c0356525b9af2ca9faf6aa8725b2ca7cb4b948
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>