Fixing problems with 1st connect of USB audio device to Fugu.

Also added some additional logging functions as we are not done
looking at connect/disconnect issues.

Leaving in tact the multi-device connect/disconnect logic (neeeds to
be revisited)

Bug: 24906368
Change-Id: Iff91c51a9c7013dde56182059f3747e1d6cd727b