WIP leave initial charger status to unknown

Otherwise shutdown from act dead without charger is delayed.
WIP remove After=usb-moded.service
WIP remove Requires: usb-moded

DSME now works without usb-moded if act dead is not needed.
WIP stop wait timer when service pops up

so that assumed "not-charging" does not happen while waiting for
async reply message
WIP shuffle & refactor