Mark optimize-contrast-image.html as failing on Android.
Mark optimize-contrast-image.html as failing on Android.

BUG=517449
TBR=skyostil
NOTRY=true

Review URL: https://codereview.chromium.org/1281553002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@200104 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk