Merge "Drag task to left or right edge to enter split select." into udc-qpr-dev am: bf8019c0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24375987



Change-Id: I3c6f6227cc3e1e8e1fe7714cdc667a73d64e5b70
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>