Merge "Return copies of private array members in Display.java to protect them...

Merge "Return copies of private array members in Display.java to protect them from being modified from the outside." into udc-dev am: 037b13c9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22648883



Change-Id: Ife709c856ae80d0d3a8cfbe194c2bb152170e6c1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>