Merge "[Search] Introduce notifyEvent api in OneSearch plugin" into sc-v2-dev am: 8727c4f78b am: 243df63998

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16223393

Change-Id: Ie2b1b836d8a4f890f96e3ca4a41dd0241c306048