Don't use cutils/Atomic.h

Test: builds
Change-Id: I56aea1dff5a2bd98d119eb374e7a28a12a20861c
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 91f4d37..69ba529 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -39,8 +39,8 @@
 #include <memunreachable/memunreachable.h>
 #include <utils/String16.h>
 #include <utils/threads.h>
-#include <utils/Atomic.h>
 
+#include <cutils/atomic.h>
 #include <cutils/properties.h>
 
 #include <system/audio.h>