Fix device.cordova to report 2.3.0

- IMF RTC work item number: 16060
- Apache Cordova Jira issue: n/a
- Markmail or Google Group reference: http://markmail.org/message/wr5naim4tvwgywxw
- Description: the device.cordova value was returning the wrong value of
  "2.2.0" It has been patched to report the correct value, "2.3.0". This
  was accidently skipped during release activities.