RecordTrack::createRecordTrack_l flags are in/out

The flags are currently unused, but will be used for requesting a fast
track.  Making flags in/out will allow reporting back up to client that
the request is denied.

Change-Id: Ifbee57da3632ce130551065a426577fb97b1a68d
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index aa04fd4..1453698 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -837,7 +837,7 @@
                     audio_channel_mask_t channelMask,
                     size_t frameCount,
                     int sessionId,
-                    IAudioFlinger::track_flags_t flags,
+                    IAudioFlinger::track_flags_t *flags,
                     pid_t tid,
                     status_t *status);