[Merge] lp:~uriboni/camera-app/no-permissions-dialog into lp:camera-app/staging

[Ugo Riboni]

> Would not a better solution be for the trust prompt that requests access to
> the camera to reappear as it does the first time you launch the camera app?

Probably, but I think there is a difference in removing the app from the trust store (which causes a prompt on next launch) and disabling it (which causes the app to silently be denied access).

The control panel just disables the app but it leaves the entry in trust store, so that the user can go there and re-enable it if needed. 
If we change the control panel's logic to actually remove the app from the store, then the only way to re-enable it would be to launch it again.

All other services (GPS, microphone) also work in this way, so we either change all or none.


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https://code.launchpad.net/~uriboni/camera-app/no-permissions-dialog/+merge/279260
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