Camera permission includes video but not microphone

0. Flash the phone.
1. Launch the Camera.
2. Tap the video button.
3. When something you want to record is about to start, tap the record button.

What happens:
1. The system asks for permission to let Camera use the camera.
2. Nothing.
3. The system asks for permission to let Camera use the microphone — at the worst possible moment.

What should happen:
1. The system asks for permission to let Camera take photos.
2. The system asks for permission to let Camera record video.
3. Nothing, because the ability to record video includes the ability to use the microphone.
<https://wiki.ubuntu.com/SecurityPermissions#permissions>

The relevant trust-store permission may not exist yet. If it doesn’t, this needs fixing in trust-store first.

Then, the camera app needs fixing to try recording *video* before you actually tap record, i.e. when you first switch to video mode, so that the prompt isn’t triggered later at the worst possible moment.