Bring back multiple device pairing

[pbhgl]

Pebble Android app stuck on NEGOTIATING has more info about that:

@steve

Basically, you cannot have multiple phones paired to the same watch over BLE because that was never implemented in watch firmware. Those watches never used BLE on android previously, which is why it used to work (multiple BT classic pairings do work).

We disabled adding multiple pairings on the watch itself on the new watches (to prevent it being very annoying and randomly working sometimes), but on old watches like Time Steel, you might find that it works if you enable BT classic mode in settings.

@steve

I’ll be honest, for the new watches (which don’t support BT classic) it would take some re-architecting how BLE works with Pebbles to make it work reliably with multiple pairings, and we just haven’t had enough people ask us about that for it to make sense putting in that effort.

I used that feature regularly with my old Pebbles and will of course miss it on my PR2.

But maybe if enough people ask for it …