hal: change dts notifier nodes path to satisfy seandroid policy

Change dts notifier nodes path to /data/misc/dts/ to
satisfy seandroid policy.
Also remove AudioUtil source and header file from this project
as writing to route node is already moved to AudioPolicyManager.

Change-Id: I656e28077a6224b25e26d7476401bfb11fd141c8
diff --git a/post_proc/effect_util.c b/post_proc/effect_util.c
index cda89bc..8f7a604 100644
--- a/post_proc/effect_util.c
+++ b/post_proc/effect_util.c
@@ -44,7 +44,7 @@
                               "bassboost_param_strength"
 };
 
-#define EFFECT_FILE "/data/data/dts/effect"
+#define EFFECT_FILE "/data/misc/dts/effect"
 #define MAX_LENGTH_OF_INTEGER_IN_STRING 13
 
 #ifdef DTS_EAGLE