[Android] Make the autofill editor footer a NOTICE list item

The footer messages in the address and contact editors were previously
fixed at the bottom of the dialog. This change refactors them into a
regular editor item, making them part of the scrollable list. This
allows for flexible construction of the editor's content, which is
necessary because the Home & Work project will require a different order
of notices in its UI.

Key changes include:

- A new NOTICE item type is introduced in EditorProperties to
  represent non-interactive text messages.

- The EditorDialogView's dedicated footer is removed.The dialog's
  footer notices are now included within the main content.

- Logic in AddressEditor and ContactEditor is updated to add notices
  (e.g., "Required fields *") as NOTICE items to the field list.

- An importantForAccessibility parameter is added to the notice item
  to control announcements by screen readers.

- The editable_option_editor_footer.xml layout is deleted.

This change also slightly aligns the padding of the "required field"
and "record type" notices.

Mocks:
https://www.figma.com/design/IwB272Z5KxJyjfSwryZ0ms/Chrome-Autofill--Home---Work?node-id=4191-16869&t=yTQu3p7h32HpcnJ2-1

UI video with all flows:
http://screencast/cast/NjcxMDA0MjM0NTYwMzA3Mnw0NDcyNmIyYS05Zg

Bug: 430218067
Change-Id: I0a9d5d143636ffa3a987d5aa220daa07fe53d753
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6798152
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Timofey Chudakov <tchudakov@google.com>
Commit-Queue: Piotr Kotynia <piotrkotynia@google.com>
Cr-Commit-Position: refs/heads/main@{#1495361}