CB-6920 "File not found" error when using targetWidth and targetHeight on Windows8 with Camera plugin and FILE_URI

Issue [CB-6920](https://issues.apache.org/jira/browse/CB-6920)

When using getPicture with targetWidth and targetHeight set and FILE_URI destination no picture data is returned, the error callback is hit with the message "File not found"
If you remove targetwidth and targetheight, the camera plugin works.

Reason -  incorrect usage of File plugin.