Fix restoring MPD state in setAVTransportURI
The current MPD state should be get before a clearQueue command is invoked, as after clearing the queue the MPD state is STOP.
Also only issue an play command to MPD if MPD was playing before clearing the queue.
Authored by: Jörg Krause 2016-04-06
Parent(s): [279fc2]
Child(ren): [9acdc7]
