camera: fixes for video recording

* Revert back to old method of handling video recording frames.
  This drops the framerate for 720P videos but atleast prevents
  them from flickering and choppiness.
* Implement proper Camera Mode when the camera is in Video Mode.
* Use DSS Resizer instead of ISPResizer.

Change-Id: I5c89abcdbbde229e85ce0edd04739171aad75539