Fixed callSuperMethod()

It would not have worked the old way if it was actually called with at least one object, because the getMethod() method needs the Classes.
All calls are without passing any argument, so it is not necessary here to deal with this case.
Fixed hook to show Toast that the Video was saved to the SD Card.

The UI was heavily changed with the new release of Snapchat 3, so the "showVideo" hook now has to target the "ui.SnapView" class. It now receives a Context Object as an argument.