Merge "Implementing support for item diffing instead of creating out the...

Merge "Implementing support for item diffing instead of creating out the complete UI on every update" into tm-dev am: 4bd36a37

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18116442



Change-Id: I80d174bb057f49e399620c8bb248e6639c924301
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>