postmarketos-base-ui: Add pipewire-tools to postmarketos-base-ui-audio-pipewire to fix pipewire audio workaround

This change fixes call audio issues reported in #3091 (closed) and #1876.

Sideloading the updated soc-qcom-sdm45 is not installing pipewire-utils 🤔, maybe I'm missing something.

I wonder if adding the dependency in postmarketos-base-ui-audio-pipewire could be a better solution.