Telemetry: Only update device .apk if --browser isn't specified

R=tonyg@chromium.org, bulach@chromium.org
NOTRY=true
BUG=305302

Review URL: https://codereview.chromium.org/26513003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227572 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227572