Move libnbaio out of AudioFlinger

libnbaio is now a separate shared library from AudioFlinger, rather
than a static library used only by AudioFlinger.

AudioBufferProvider interface is now also independent of AudioFlinger,
moved to include/media/

Change-Id: I9bb62ffbc38d42a38b0af76e66da5e9ab1e0e21b
diff --git a/services/audioflinger/AudioMixer.h b/services/audioflinger/AudioMixer.h
index 46deae7..6e34cd1 100644
--- a/services/audioflinger/AudioMixer.h
+++ b/services/audioflinger/AudioMixer.h
@@ -23,7 +23,7 @@
 
 #include <utils/threads.h>
 
-#include "AudioBufferProvider.h"
+#include <media/AudioBufferProvider.h>
 #include "AudioResampler.h"
 
 #include <audio_effects/effect_downmix.h>