On an unexpected disconnect of an established connection (connectedOnce, i.e.
services were discovered), reconnect via the scan path up to 3 times, 8s apart,
resetting the budget on each successful reconnect. The scan gives up (stopSelf)
if the strap isn't found, so we never hammer a band that wasn't present at start
or wasn't connected by hand. A user stop, Bluetooth off, or onDestroy sets a
stopping flag that suppresses reconnect.
4aiman
9bc71b19c9