Add more intelligence to bluetooth connection state

Since bluetooth connection state has a mind of its own... If we
think we are connected, but we don't actually know about any devices
that are currently connected, we probably aren't. So set the state
that way, and let everyone know.

Bug: 22977827
Change-Id: I9266f5394b179a3917b3818839f7c6b2dc238376
1 file changed