Split default camera and microphone settings into separate toggles

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Feature request

Which Nextcloud Version are you currently using:
32.0.5, Talk v2.0.4

Is your feature request related to a problem? Please describe.
In the "Devices" setting section, there's a toggle to "turn camera and microphone off by default". It's great that we have this option, but most of our internal use is with microphone on and camera off. So right now, we have to choose one of two bads — usually both off to be safe — and then turn on the mic before every single call.

Describe the solution you'd like
It would be great if the current setting "turn camera and microphone off by default" was split into two separate switches, one for the camera and one for the microphone.

Describe alternatives you've considered
An alternative would be to simply always keep the settings from the last call you were in.

Start in the Devices settings section and locate the existing combined camera-and-microphone default toggle. Separate its camera and microphone behavior into two switches, and verify that each setting can be controlled independently.