Umbrella bug for tracking adding DFM support for assistant + autofill. Per gogerald@, code, resources, etc. live in:

1, codes under "src/components/autofill_assistant/"
2, test codes under "src/components/test/data/autofill_assistant/" - may no need?
3, strings under "components/autofill_assistant_strings.grdp"
4, codes under "src/chrome/browser/android/autofill_assistant/"
5, java codes under "src/chrome/android/java/src/org/chromium/chrome/browser/autofill_assistant/"
6, dedicated resources/assets under "chrome/android/java/res_autofill_assistant/"
7, java tests under "src/chrome/android/javatests/src/org/chromium/chrome/browser/autofill_assistant/" - may no need?