Sxmo+SDM845: working calls out of the box and add pulseaudio bluetooth package

This MR seeks to fix call audio on sdm845 devices out of the box when running Sxmo (https://gitlab.com/postmarketOS/pmaports/-/issues/1821), clean up packaging, and add a bluetooth package for pulseaudio on Sxmo+pulseaudio.

Currently, this MR:

1. Adds a bluetooth package that installs everything needed for working bluetooth on Sxmo running pulseaudio
2. configures call_audio_idle_suspend_workaround service so that it uses Sxmo's XDG_RUNTIME_DIR path

I have marked this MR as WIP because I need help to accomplish the following things:

1. I want the call_audio_idle_suspend_workaround service in openrc to restart when the service crashes. If call_audio_idle_suspend_workaround crashes, calls dont work and it is crucial for phosh (not just Sxmo). Is there an example of a service that is automatically restarted by openRC when the service crashes?
2. On SDM845 devices, I want sxmo-common-audio-pulse to be installed rather than sxmo-common-audio-pipewire. I was able to install my custom config for the call_audio_idle_suspend_workaround service using the install_if variable: https://gitlab.com/anjandev/pmaports/-/commit/410eed300908ea1828f7fe46a98c9d50aef2150d

However, when I tried to add install_if=$pkgname=$pkgver-r$pkgrel soc-qcom-sdm845-nonfree-firmware to the sxmo-common-audio-pulse subpackage, the sxmo-common-audio-pulse package is not automatically installed on my oneplus 6. I must manually run: doas apk add sxmo-common-audio-pulse to get pulseaudio installed and running on my oneplus 6.

This MR should be merged into v22.12 once it installs pulseaudio automatically to SDM845 devices.