PinePhone: Modem quick resume support

https://dylanvanassche.be/blog/2021/pinephone-modem-myths/ and https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/blob/main/NEWS mention a --test-quick-suspend-resume flag for modemmanager.

Document --test-quick-suspend-resume in https://wiki.pine64.org/wiki/PineModems
What is needed to enable --test-quick-suspend-resume by default? Is this tracked anywhere?

Edited Mar 25, 2022 by Tom