The disabling of camera can be done using rhoelements Imager API through rhoelements application.
or There is a Home screenlock application is there which can be used to not providing the access to applications which can enable the camera on ET1
Our Enterprise Home Screen can restrict the usage of the ET1 to only some apps. If the allowed apps, don’t use the camera, you get the same result.
For what I know, there’s an app that can disable camera function on the play store, but it’s only for Android v4.x:
If you use Rhodes without rhoelements you may do not list 'camera' capability in application's build.yml
RhoElements enabled applications cannot disable camera