Merge "Persist prediction cache on every update" into rvc-dev am: 7f1f8030 am: 53d65ac8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/12077951

Change-Id: Ifd801027b232fe68a731d69181a658c719b8fdd9