bionic tests: switch to using android-base/file.h for TemporaryFile

A matching definition of TemporaryFile exists in libbase now.

Test: compile
Bug: 119313545
Change-Id: I6f84dbf3af9a9c4b270a2532a36c9cb4c0f6bb8f
diff --git a/tests/sys_uio_test.cpp b/tests/sys_uio_test.cpp
index 60bd224..8460041 100644
--- a/tests/sys_uio_test.cpp
+++ b/tests/sys_uio_test.cpp
@@ -18,7 +18,7 @@
 
 #include <sys/uio.h>
 
-#include "TemporaryFile.h"
+#include <android-base/file.h>
 
 TEST(sys_uio, readv_writev) {
   TemporaryFile tf;