[Payment Handler] Tests for basic-card payment method change.

Bug: 884680
Change-Id: Ie0a5571990c1e8a925f91ba87f62ed74d802a9e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1620285
Commit-Queue: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Danyao Wang <danyao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661471}
8 files changed