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

Merge "Inherit source task windowing mode if available" into udc-qpr-dev am: d6cdafe3 am: 5cd502d2

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



Change-Id: I2bc3e4edc257dd5c13c4a9f6e7affe43efcd1bfe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>