MN-469 Fixing portrait camera + prevent zoom/wide camera

[dlymonk]

No description provided.

[souyahia]

Also now that I think about it : when I wrote the code for the Camera in the refacto, I thought it was a good idea to let the user select the device manually using a deviceId in the constraints given to the Camera component. But after Deepak's work on the camera, it appears that this is a mistake : we should always handle the device selection ourselves to prevent users from using zoomed cameras by inadvertance.

So could you take the time to remove this option in the code please? Remove every option to select the deviceId in the camera constraints (everywhere in the code : in the Camera props, in the getMediaConstraints, in the type definitions, in the doc etc.)