Set size for VCN 3DS pop-up

This CL sets the size of the VCN 3DS pop-up based on the Mastercard and
Visa developer guides.

Bug: 1517762
Change-Id: Ia90fb558e137551c40cdc05232456d53f551767e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5393432


Reviewed-by: Siyu An <siyua@chromium.org>
Commit-Queue: Vinny Persky <vinnypersky@google.com>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Reviewed-by: Christoph Schwering <schwering@google.com>
Cr-Commit-Position: refs/heads/main@{#1278953}