This may have been the cause of bug #69. Removed the wait-for-shutdown
code in DroidtoothPlugin that was added to attempt to avoid that bug.

Thanks to the team that audited CryptoCat for this idea. :-)

This may have been the cause of Bluetooth not always being disabled at
shutdown on the Sony Xperia Tipo.

This should enable us to connect to contacts faster at startup and
whenever a new means of connecting becomes available.