Merge "Consolidate drag to split gesture with shell transition" into tm-qpr-dev am: 14376ccd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19125490



Change-Id: I0aece3465b0df21563cc18577a7a1d7c7037c5d8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>