Merge "Inherit source task windowing mode if available" into udc-qpr-dev am: d6cdafe3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23846289



Change-Id: If72c64d3563934868e39b2ce8e08224c9dda7cfe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>