Add extreme bit rate 595 kbps toggle for SBC_XQ
The android open source distro Lineage OS has an option to bump the bitrate for EDR 2mbps devices from 452 kbps to 595 kbps at the cost of reducing stability in congested conditions.
I think this was achieved by removing the MTU limit, but does cause crackling on some devices particularly those made in 2015 or earlier, so should be turned off by default.
Could this be added as a option in the .conf?, similar to the recent option to set LDAC quality to hq, sq, mq rather than auto.