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Before change:
* With Expandable PH UI enabled, if merchant pages call
complete("fail"), the screen would be covered under scrim and Clank
would crash on refresh.
* With CCT PH UI enabled, if merchant pages call complete("fail"), it
would open Error View after closing PH UI.

After change:
The Error View is no longer shown on complete("fail").

Changes:
* remove Error View from Android Payment Request UI.
* Tests
 * add a test to ensure http would be rejected for openWindow(url)
 * add a test to cover complete ("unknown").

Bug: 1044077, 1047237, 1042892, 1045474

Change-Id: I0123e163d4cd0a97d1536d5c4baefa0e646c50d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2019922Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Commit-Queue: Liquan (Max) Gu <maxlg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737634}