Explicitly include Configuration.h

Must include Configuration.h in any source file with #ifdef or #if that
depends on Configuration.h.  This avoid inconsistencies that could result
in subtle bugs.

Change-Id: I99fdf19d56e7c73de4e7d672b937336b932a2a00
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 894bd35..fd9fe96 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -18,6 +18,7 @@
 #ifndef ANDROID_AUDIO_FLINGER_H
 #define ANDROID_AUDIO_FLINGER_H
 
+#include "Configuration.h"
 #include <stdint.h>
 #include <sys/types.h>
 #include <limits.h>