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: 963dc4e9 am: 5c7179c1 am: 62ae380a

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



Change-Id: Ib71b42cd62c258e8543a6f7569354e904e71ce48
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>