Merge "Notify organizer about TaskFragment parent windowing mode change" into...

Merge "Notify organizer about TaskFragment parent windowing mode change" into tm-dev am: 6725f73a am: 2fcdff4a am: 530e363f

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



Change-Id: I34421bcc6be28aa7751aab99559aebf51e7a0243
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>