This change adds mSBC codec support to bluetooth native headset backend, enabling wideband speech.
mSBC will be used by default with headsets claiming support. If it is causing problems mSBC can be disabled via module-bluetooth-discover
module argument enable_msbc
like this
load-module module-bluetooth-discover enable_msbc=false
Native backend and codec itself is based on original development by @jejb here https://git.kernel.org/pub/scm/linux/kernel/git/jejb/pulseaudio.git/log/?h=jejb-v12