fix: respect user changes of devices state when toggling it

[DorraJaouad]

☑️ Resolves

🖌️ UI Checklist

🖼️ Screenshots / Screencasts

🏚️ Before
If you have default device state to be off and you toggle either audio or video on before joining the call, your changes won't be considered

🏡 After
If you have default device state to be off and you toggle either audio or video on before joining the call, your changes will be considered

🏁 Checklist

• 🌏 Tested with different browsers / clients:
  • Chromium (Chrome / Edge / Opera / Brave)
  • Firefox
  • Safari
  • Talk Desktop
  • Not risky to browser differences / client
• 🖌️ Design was reviewed, approved or inspired by the design team
• ⛑️ Tests are included or not possible
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required

[nickvergessen]

In the future we should store enabled and disabled, so that we could know if the user enabled it already in a conversation at some point and not always disable it. So that it is a real "default", not a "force"

[nickvergessen]

/backport to stable30