Change Camera Preview Size

Changed camera preview to be closer to the recording video size.  With
such a high default resolution on the camera preview
you woul see much more on the preview than in the actuall recorded
video.

To support this type of behavior I also added to helper function
checkPreivewFPS, and Size supported.  What ever is set for
these values we will check to make sure they are supported.  If they are
all is OK, otherwise we throw an exception.