Persisting status int on the device if fallback happened

This CL also stop from incresing "successes" counter if the
importer finishes with fallback.

Ignore-AOSP-First: in a topic with internal-only changes
Test: manual
Bug: 230289468
Change-Id: I88fce1b2d0dea3772a8b31df8f8fa93bf13bffad
2 files changed