Simplify audio-ctrl helper package

[josa41]

Description of changes

Minor change to simplify audio-ctrl helper script
The script is used by eww-bar and desktop for hardware volume buttons

Checklist for things done

• Summary of the proposed changes in the PR description
• More detailed description in the commit message(s)
• Commits are squashed into relevant entities - avoid a lot of minimal dev time commits in the PR
• Contribution guidelines followed
• Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• PR linked to architecture documentation and requirement(s) (ticket id)
• Test procedure described (or includes tests). Select one or more:
  • Tested on Lenovo X1 x86_64
  • Tested on Jetson Orin NX or AGX aarch64
  • Tested on Polarfire riscv64
• Author has run make-checks and it passes
• All automatic Github Action checks pass - see actions
• Author has added reviewers and removed PR draft status
• Change requires full re-installation
• Change can be updated with nixos-rebuild ... switch

Instructions for Testing

• List all targets that this applies to:
• Is this a new feature
  • List the test steps to verify:
• If it is an improvement how does it impact existing functionality?

[johannarautanen]

Tested on Lenovo-X1 (flashed to the SSD) (commit: f87bd8a)

Working:
-internal, usb, 3,5mm and bluetooth audio works with Chromium, Microsoft(365,outlook,Teams), slack, video editor.
-volume control works via bar and keyboard-buttons and ghafaudiocontrolstandalone
-all other ghaf apps can be launched
-ci-test automation cases ok (older auitomation tests before 18th oct)

Notes:
After you close chromium, business and comms-applications, the "GhafAudioControlStandlone"-app still shows the tunnels:

[josa41]

Tested on Lenovo-X1 (flashed to the SSD) (commit: f87bd8a)

Working: -internal, usb, 3,5mm and bluetooth audio works with Chromium, Microsoft(365,outlook,Teams), slack, video editor. -volume control works via bar and keyboard-buttons and ghafaudiocontrolstandalone -all other ghaf apps can be launched -ci-test automation cases ok (older auitomation tests before 18th oct)

Notes: After you close chromium, business and comms-applications, the "GhafAudioControlStandlone"-app still shows the tunnels:

Yes it can be that the tunnels are still shown in the list but it has got nothing to do with this ticket. :)

The tunnels showing can be fixed with for example as #852 or then the audio control application could show the actual pulseaudio data streams (sink-input / source-outouts) instead of the ghaf-audio tcp tunnels (sink / source).

I can have a chat with @baz2142 about audio control app.