Merge "Rename WindowDecor classes for Desktop Mode." into tm-qpr-dev am: eeaee6e7 am: 8bac1aee

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20816067



Change-Id: I052e72fb6e54837f7e81ccac76875d4f86aa87b9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>