This code should run against older phoc (showing the old behavior) so we don't need a new hard dependency on newer phoc yet (to ease bisecting, etc). I want to retest that though, hence draft (also since we want to wait until the phoc protocol change landed).
Note that this needs the phoc side to work (phoc!431 (merged))
I'll post the code that leverages power button long press separately. (See !1224 (merged))
Closes: #911 (closed)