DevTools: fix User-Agent for Samsung Galaxy S4

This patch updates User-Agent for Samsung Galaxy S4.

BUG=354920
TBR=pfeldman, apavlov

Review URL: https://codereview.chromium.org/210043002

git-svn-id: svn://svn.chromium.org/blink/trunk@169861 bbb929c8-8fbe-4397-9dbb-9b2b20218538