Migrate Widgets to new Search API am: 7c1e37cce1

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13420066

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib5c6c039909e57c585448d0fc692cdfc3a1c61b6