Mark all pixel tests as failing on Android with the correct bug number.

TBR=peter@chromium.org
BUG=293932

Review URL: https://codereview.chromium.org/23790008

git-svn-id: svn://svn.chromium.org/blink/trunk@157978 bbb929c8-8fbe-4397-9dbb-9b2b20218538