overlay: Use autofill compatibility mode for browsers

Provide the same autofill compatibility list that is provided by Google
on devices with Google Play Services, with the addition of CalyxOS's
build of Bromite (Chromium).

Without extensive effort by third-party developers, Chromium-based
browsers do not currently support native autofill. Other browsers in
the list may support this now, but we still include them, too.

Issue: calyxos#1063
Change-Id: I4859ca14b0670284c35dc6cb293826c71e4662bf