Rely on Display#getRealSize when dumping XML hierarchy am: 74184991 am: 90075dd1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21544237



Change-Id: I06752d3d5c2fe76d5e0864c811762d70e6696ccb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>