ART: Include cleanup

Let clang-format reorder the header includes.

Derived with:

* .clang-format:
 BasedOnStyle: Google
 IncludeIsMainRegex: '(_test|-inl)?$'

* Steps:
 find . -name '*.cc' -o -name '*.h' | xargs sed -i.bak -e 's/^#include/ #include/' ; git commit -a -m 'ART: Include cleanup'
 git-clang-format -style=file HEAD^
 manual inspection
 git commit -a --amend

Test: mmma art
Change-Id: Ia963a8ce3ce5f96b5e78acd587e26908c7a70d02
diff --git a/test/905-object-free/tracking_free.cc b/test/905-object-free/tracking_free.cc
index 5479772..bf86c9a 100644
--- a/test/905-object-free/tracking_free.cc
+++ b/test/905-object-free/tracking_free.cc
@@ -14,9 +14,10 @@
  * limitations under the License.
  */
 
-#include <iostream>
 #include <pthread.h>
-#include <stdio.h>
+
+#include <cstdio>
+#include <iostream>
 #include <vector>
 
 #include "android-base/logging.h"