network_3GSafetyDance: use service, not self.service, to disable AutoConnect

Fix a foolish mistake; self.service is not set until later.

BUG=None
TEST=Adhoc (test now runs)

Change-Id: Iacfb3a4e886474a1c520c8993aab4852bafee01f
Reviewed-on: http://gerrit.chromium.org/gerrit/5683
Reviewed-by: Elly Jones <ellyjones@chromium.org>
Tested-by: ttuttle <ttuttle@chromium.org>
1 file changed