IAudioFlinger::openRecord track_flags_t flags is in/out

This will allow AudioFlinger to tell client it is denying a request.

Change-Id: Iff2be3ad6636371bbda9c9899a283c94620c1f06
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index d99b779..e5e4113 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -117,7 +117,7 @@
                                 audio_format_t format,
                                 audio_channel_mask_t channelMask,
                                 size_t frameCount,
-                                IAudioFlinger::track_flags_t flags,
+                                IAudioFlinger::track_flags_t *flags,
                                 pid_t tid,
                                 int *sessionId,
                                 status_t *status);