upnp: enable X_GetFeatureList

for all requests first try to get features
if found use the audioItem container as root

Change-Id: I211b3a0b79f034dc9115fd319ee08b3220c4161c
upnp: add song list support

Change-Id: I387b490c94be6ee3d50eef058d8f6a9c08b47d93
drive: add song list support

Change-Id: Iacdda3f795cb8f9d9ad185a0478d262d9d63f148