fallout of cleaning-up libutils includes

Test: run & compile
Bug: n/a
Change-Id: I0f6a0be03f4b120b1b5876aae0c0618c025d9f2b
diff --git a/media/jni/android_media_ImageReader.cpp b/media/jni/android_media_ImageReader.cpp
index 724fc02..b00f5a5 100644
--- a/media/jni/android_media_ImageReader.cpp
+++ b/media/jni/android_media_ImageReader.cpp
@@ -17,6 +17,7 @@
 //#define LOG_NDEBUG 0
 #define LOG_TAG "ImageReader_JNI"
 #include "android_media_Utils.h"
+#include <cutils/atomic.h>
 #include <utils/Log.h>
 #include <utils/misc.h>
 #include <utils/List.h>