Continuous Flicker and Critical camera hardware sound caused

[Ankish]

In viewWillAppear of the example app, update the FPS of the capture to the highest possible in the device. Tap on the back lense as fast as you can for a while, the video preview flickers continuously post that there and no way to stop it once it goes flicker state. Plus the camera hardware starts to make a sound.

NextLevel.shared.updateDeviceFormat(withFrameRate: CMTimeScale(120),
                                            dimensions: CMVideoDimensions(width: 1280, height: 720))