Merge "Fixing empty page not removed when drag ends" into sc-dev am: befaad269e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13742639

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib97a98094d61e39b2a85ec46b0da59a2cd9f8439