Merge "If task dragged to outer disallowed area, position back under the area"...

Merge "If task dragged to outer disallowed area, position back under the area" into udc-qpr-dev am: 5132a790 am: 9e152da6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23621248



Change-Id: I7b22fb29b548a059cc631bdffa8a4846596ade4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>