[AF] User server_id as key in AutofillDataModelChange for server data

This CL changes what is used as the key when notifying
AutofillDataModelChange for server credit cards / server profiles.
Instead of the GUID we need to notify server_id so that the
wallet_metadata sync bridge can properly react to notification of type
DELETE (the bridge needs the server_id of the data to generate the
storage key of the metadata that should get deleted).

Bug: 853688
Change-Id: Ie30a82fc8601fdf6e5428a40a00ce8f75263907e
Reviewed-on: https://chromium-review.googlesource.com/c/1375991
Reviewed-by: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616606}
4 files changed