Disable WebFrameTest.FindInPageMatchRects on Android

(to unblock Blink rolls)

BUG=341314
R=pdr@chromium.org
TBR=pilgrim@chromium.org

Review URL: https://codereview.chromium.org/150283004

git-svn-id: svn://svn.chromium.org/blink/trunk@166570 bbb929c8-8fbe-4397-9dbb-9b2b20218538