[AR Foundation]How do i change camera in runtime?

Hi, i'm trying to change camera from back camera to front camera for android device in Runtime(face camera)
can i change camera in runtime? and how do i change?
maybe my idea is two scene and if i clieck button(start A scene and back camera), load B scene.

and if you know change camera, please write how to start device from my choose setting camera

 

i found sample code.
reference : https://github.com/Unity-Technologies/arfoundation-samples/issues/481