Cosmetics - Fix header file order in unit tests

Change-Id: I9582a8d74990125b71e8fe620f7f3f2585a30798
diff --git a/test/decode_test_driver.cc b/test/decode_test_driver.cc
index 7ce190c..ad861c3 100644
--- a/test/decode_test_driver.cc
+++ b/test/decode_test_driver.cc
@@ -7,9 +7,11 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
+
+#include "third_party/googletest/src/include/gtest/gtest.h"
+
 #include "test/codec_factory.h"
 #include "test/decode_test_driver.h"
-#include "third_party/googletest/src/include/gtest/gtest.h"
 #include "test/register_state_check.h"
 #include "test/video_source.h"