Bluetooth: Audio: Shell: Add additional controller configs to audio.conf

The configuration file is mostly tested for the nRF53 series
where the controller configuration is usually from the
hci_ipc sample.

This means that the existing audio.conf before this commit
has not really been tested for audio, and were missing a few
configurations to make it work properly.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>