NuPlayerRenderer: handle error when resuming an offloaded track

Make sure that an offloaded audio track is torn down if
start() returns an error in onResume().
This makes sure that a track invalidated due to a potential
audio path change while paused is re created on the correct
output.

Bug: 22256441.
Change-Id: I6c7bfec6e7322415daffc0451bab46d0c558522a