audio: update for audio/audio_policy header names/locations

Change-Id: I36c49352eee57559403cd1597f56a8485a360289
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index 68cd188..89213b7 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -22,7 +22,7 @@
 #include <media/IAudioFlinger.h>
 
 #include <system/audio.h>
-#include <hardware/audio_policy.h>
+#include <system/audio_policy.h>
 
 /* XXX: Should be include by all the users instead */
 #include <media/AudioParameter.h>