Merge "[Search] Introduce feature flag ENABLE_ONE_SEARCH" into sc-v2-dev am: d942287299 am: 625d375536

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15975399

Change-Id: I8e17b762a7ba7fae6820e9816d6e365741822c11