[Android] Show plus address snackbar.

This CL adds necessary logic to the chrome autofill client
to show the plus addresses snackbar on Android.

Bug: 363695013
Change-Id: I32df4f85e8815238883880375bbfeb4a3285bdd6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5925376
Reviewed-by: Jan Keitel <jkeitel@google.com>
Commit-Queue: Timofey Chudakov <tchudakov@google.com>
Cr-Commit-Position: refs/heads/main@{#1367423}