[ios] Presents Password Settings from Passwords InfobarModal.

Tapping on the Settings Modal icon will now present Password settings.

-Creates new presentPasswordSettings method.
-Adds animated support to dismissInfobarModal.
-Plumbs a dispatcher to InfobarCoordinator.

Bug: 945478
Change-Id: Ied85947edc35c807718cfac79d7812bf4211a6f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1576004
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653044}
10 files changed