Only run device provisioning step on JellyBean and later.

This fixes failure on older OSes.

BUG=309662
TBR=bulach@chromium.org

Review URL: https://codereview.chromium.org/181503011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253682 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253682