Sorry, I'm just a demo(lition) man; anything I made would probably blow your sh*t right up. No, you need someone that really knows what they're doing. For instance, they would be sure to warn you when the camera app is currently using the rear lens. And they would allow you to choose what app(s) run and quit when you open and close the slide cover. Helpful and robust stuff like that.

Even so, I still think you should try my suggestion. Go for it!

Just reboot if all goes to hell.