[ios] Add access to management page to settings UI info bubble

When the settings are managed by enterprise policy, a "learn more" link
should be shown in the popup bubble triggered by the information icon
by the end of the settings item. Clicking "Learn More" will navigate to
chrome://management page.

Added access to settings below:
- Settings -> Password -> Save password
- Settings -> Payment Method -> Save and Fill Payment Methods
- Settings -> Address and More -> Save and Fill Addresses
- Settings -> Search Engine
- Settings -> Content Settings -> Block Pop-ups

Bug: 1109002
Change-Id: I4bdba99c1a4d2451a99ddeb8f048af77a2aaa334
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2337719
Commit-Queue: Tina Wang <tinazwang@chromium.org>
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#795470}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: cdcb232bbf8e2576f84382ab42039783a568bea6
8 files changed