AudioFlinger: Move small files to afutils

Test: ALLOW_LOCAL_TIDY_TRUE=1 mm -j .
Bug: 287549635
Change-Id: I148097b7ed8091d549d1cf541105c31bceb7450f
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 6406c6f..60717b5 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -59,7 +59,7 @@
 
 #include "AudioFlinger.h"
 #include "EffectConfiguration.h"
-#include "PropertyUtils.h"
+#include <afutils/PropertyUtils.h>
 
 #include <media/AudioResamplerPublic.h>