Fix build

Change-Id: I4d1e396d812b6a22087d35156633451d5c1c36bc
diff --git a/services/audioflinger/ServiceUtilities.cpp b/services/audioflinger/ServiceUtilities.cpp
index 8c449a0..2e68dad 100644
--- a/services/audioflinger/ServiceUtilities.cpp
+++ b/services/audioflinger/ServiceUtilities.cpp
@@ -18,6 +18,7 @@
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
 #include <binder/PermissionCache.h>
+#include <private/android_filesystem_config.h>
 #include "ServiceUtilities.h"
 
 /* When performing permission checks we do not use permission cache for