fallout of cleaning-up libutils includes

Test: run & compile
Bug: n/a
Change-Id: I63585ed5a764b9ce7af2187b79ca0c83e683fd7f
diff --git a/services/camera/libcameraservice/api1/CameraClient.cpp b/services/camera/libcameraservice/api1/CameraClient.cpp
index b83d425..ffb657e 100644
--- a/services/camera/libcameraservice/api1/CameraClient.cpp
+++ b/services/camera/libcameraservice/api1/CameraClient.cpp
@@ -17,6 +17,7 @@
 #define LOG_TAG "CameraClient"
 //#define LOG_NDEBUG 0
 
+#include <cutils/atomic.h>
 #include <cutils/properties.h>
 #include <gui/Surface.h>
 #include <media/hardware/HardwareAPI.h>