[ios] add a password generation manager to ios

Just set the pipeline, hidden behind a flag for now.

Bug: 886583
Change-Id: I3b1b5f30400bef03e7070241c9f487b2b5ea1399
Reviewed-on: https://chromium-review.googlesource.com/c/1369771
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Commit-Queue: David Jean <djean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616614}
6 files changed