Being part of the bluetooth.target means that this service (if
enabled) is started automatically every time the bluetooth service is
(re)started.

WiFi was skipped since I've not found a reliable way to have
bootmac configure the mac, it's racing with the driver, NM, and
iwd/wpa_supplicant. The udev rule for wifi should just be dropped
altogether when packaging bootmac for a systemd OS since it's unreliable
and buggy.