Merge "Persist prediction cache on every update" into rvc-dev am: 7f1f8030db am: 9723e7dc34

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

Change-Id: I79c79e68a99bc78501325bafa96f1d61a3427c18