Turn camera button is not working

[vedartm]

The following line inside the function _turnCamera does not change the state.

https://github.com/pion/ion-app-flutter/blob/7c785204bf9ffbc503d7593fdb29122af98a7da5/lib/pages/meeting/meeting_page.dart#L235

It can be changed into

var muted = !_cameraOff.value;