[SysApps][Android] Fix Issue: Error callback isn't triggered without SIM card.

The onSmsSend put a error message and return when no SIM card is ready. Thus,
the JS error callback won't be invoked. Simply removing the return will
resolve the issue, the error will be handled in MessagingReceiver and send
back to JS end.

BUG=https://crosswalk-project.org/jira/browse/XWALK-940