The first screenshot (complex) comes when you force
"Security.showSettings(SecurityPanel.CAMERA)" from your code.
And second screenshot (simple) screen comes if you don't force settings window to appear.
It comes automatically when you try to access camera in your code by using "attachCamera" method.
So if you want to show simple screen, don't try to show settings window by using "Security.showSettings(SecurityPanel.CAMERA)"
simply write your code to access camera, As flash player itself show camera permission window (simple window) automatically, even if you are not forcing settings window to appear.