Merge "Persist prediction cache on every update" into ub-launcher3-rvc-qpr-dev am: 9ad6b301 am: 737028c6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/12181132

Change-Id: Ic81b32e430e368c572861a60cc66437e0777065e