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: I4da14e6d5910446abaa0a890da980d602abf54d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>