Removing withParagraph1 from ModelDialogWrapper

In https://chromium-review.googlesource.com/c/chromium/src/+/6651320 Android's ModalDialog went from supporting only 2 paragraphs to supporting many paragraphs. This change is cleanup from that work. This change replaces all native calls to the old (1 paragraph only) methods with calls to the new multiple paragraph method.

There is an additional refactor in modal_dialog_wrapper.cc inside of this change which prepares for additional field support.

Bug: 427459465
Change-Id: Iee115a127608959c4fef7da0984468903f65fd07
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6667596
Commit-Queue: Jack Thiesen <jthiesen@chromium.org>
Reviewed-by: Theresa Sullivan <twellington@chromium.org>
Reviewed-by: Charles Hager <clhager@google.com>
Cr-Commit-Position: refs/heads/main@{#1478156}