Merge "Changes ENABLE_SMARTSPACE_ENHANCED to be a DeviceFlag." into sc-dev am: 39ba7604b0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13680611

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib851aed3189ef47d618c2149e2aac9d4ac1327f0