Merge "Removing unused SearchSessionManager" into tm-dev am: 34f51fbfc4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18085661

Change-Id: I4647b5265d0cf1f1b6827722609b68a264af575a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>