All of the examples app you have given just change your background. Since the statusbar and dock are translucent they change color when you set the background made with these app as you background.
The red bar from the voice memos is a system indication that some app is recording, this is not something you can change. The The status bar will become green when you there is an active phone call going and you open any app. The same with tethering.
You can not add any custom lock screen controls, there is no option for this in the SDK.