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
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp
index 2e0d0d3..04a46f4 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp
@@ -1469,7 +1469,10 @@
 
     if (mHasAudio) {
         cancelAudioOffloadPauseTimeout();
-        mAudioSink->start();
+        status_t err = mAudioSink->start();
+        if (err != OK) {
+            notifyAudioTearDown();
+        }
     }
 
     {