Merge "Notify organizer about TaskFragment parent windowing mode change" into tm-dev am: 6725f73a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18032087



Change-Id: Ic004a0cc8ed861e591934a68dc90759dd6433198
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>