[ios] Plug in obj-c credit card object in manual fill.

Also added use of cell utils in manual_fill_card_cell.

Bug: 845472
Change-Id: Ie015a2335c3cfe37f34620e2efb1447b8429d3c1
Reviewed-on: https://chromium-review.googlesource.com/c/1335550
Commit-Queue: David Jean <djean@chromium.org>
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608355}
8 files changed