Move ArrayRef to runtime/base

Will be used in upcoming CLs regarding VDEX and VerifierDeps.

Test: m test-art-host
Change-Id: I68e611a4a52246c2bdf45eab7c61f3212908afd4
diff --git a/compiler/utils/dedupe_set_test.cc b/compiler/utils/dedupe_set_test.cc
index 60a891d..4c0979e 100644
--- a/compiler/utils/dedupe_set_test.cc
+++ b/compiler/utils/dedupe_set_test.cc
@@ -20,10 +20,10 @@
 #include <cstdio>
 #include <vector>
 
+#include "base/array_ref.h"
 #include "dedupe_set-inl.h"
 #include "gtest/gtest.h"
 #include "thread-inl.h"
-#include "utils/array_ref.h"
 
 namespace art {