Merge "Rename WindowDecorModelView to reflect purposes" into tm-qpr-dev am: 9fcbcb0762

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20534843

Change-Id: Iae39084cfb0cbd5102d116e5df6f28bb96511871
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>