[Autofill] Rename Autofill.Quality* UMAs to Autofill*

Bug: 345453389
Change-Id: I7bb80cb49980a89c544cc9f15e3a8032e837fc7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5610694


Commit-Queue: Wolfgang Billenstein <bwolfgang@google.com>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Dominic Battré <battre@chromium.org>
Reviewed-by: Jan Keitel <jkeitel@google.com>
Cr-Commit-Position: refs/heads/main@{#1312625}