renamed audio policy output flag.

Renamed AUDIO_POLICY_OUTPUT_FLAG_INDIRECT to AUDIO_POLICY_OUTPUT_FLAG_NONE
which is more appropriate.

Change-Id: Ie898ddc2279db55a65ece96e09232163c2e78024
diff --git a/include/system/audio_policy.h b/include/system/audio_policy.h
index 1e0af7d..d45758a 100644
--- a/include/system/audio_policy.h
+++ b/include/system/audio_policy.h
@@ -34,7 +34,7 @@
  * sharing an output with other AudioTracks)
  */
 typedef enum {
-    AUDIO_POLICY_OUTPUT_FLAG_INDIRECT = 0x0,
+    AUDIO_POLICY_OUTPUT_FLAG_NONE = 0x0,
     AUDIO_POLICY_OUTPUT_FLAG_DIRECT = 0x1
 } audio_policy_output_flags_t;