Feature description: Add manual fallback for addresses and credit cards, already implemented for passwords as a keyboard accessory on Android.

Eng owner: ftirelo@chromium.org
Product owner: durgapandey@chromium.org

Design doc: go/autofill-manual-fallback-doc (still very WIP)

Are you planning on experimenting before launch?
Experimenting will happen as part of the waterfall rollout.

Any new strings?
Yes.

Any implications for Google webservices (i.e. sync, translate)?
Yes. Whenever the user manually fills a field, we will send a vote to the Autofill server. This should help us improve classification quality for Autofill.

Binary size?
A few more classes, shouldn't be a major concern.

Do the existing perf tests exercise all aspects of your new feature(s)?
No.