[ios] add credit card test for manual fallback

Also adds AutofillManualFallbackPhaseTwo to test bots.

Bug: 845472
Change-Id: I6bd05781c09c24c0768e24acfe59efa7ce1da05d
Reviewed-on: https://chromium-review.googlesource.com/c/1337347
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Commit-Queue: David Jean <djean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611171}
5 files changed