switch to using android-base/file.h instead of android-base/test_utils.h

Test: compile
Bug: 119313545
Change-Id: I664fb32522d01909c603d7b903475c4e9aea9223
diff --git a/benchmarks/property_benchmark.cpp b/benchmarks/property_benchmark.cpp
index 9251a05..77814bf 100644
--- a/benchmarks/property_benchmark.cpp
+++ b/benchmarks/property_benchmark.cpp
@@ -21,7 +21,7 @@
 
 #include <string>
 
-#include <android-base/test_utils.h>
+#include <android-base/file.h>
 
 using namespace std::literals;