Merge "[AA+] Reset search manager when exiting all apps." into sc-dev am: e57006fe63 am: 285c50740a am: 7b4e042824

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14804874

Change-Id: I25a8601efaf46d279b6f4b0cb8f7ae743ec7b5b4