minios: Header cleanup

- Add/Remove necessary/unncessary headers

BUG=none
TEST=emerge

Change-Id: I69fa8c23d2ba51dc939b435f23a8f91cfcd8a36c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/5015925
Reviewed-by: Saketh Pothireddy <[email protected]>
Commit-Queue: Jae Hoon Kim <[email protected]>
Tested-by: Jae Hoon Kim <[email protected]>
diff --git a/minios/utils.h b/minios/utils.h
index 056342c..c8ce488 100644
--- a/minios/utils.h
+++ b/minios/utils.h
@@ -13,10 +13,11 @@
 #include <vector>
 
 #include <base/files/file_path.h>
+#include <base/strings/stringprintf.h>
 #include <brillo/secure_blob.h>
 #include <brillo/udev/udev.h>
 
-#include "minios/process_manager.h"
+#include "minios/process_manager_interface.h"
 
 namespace minios {