process_sandboxer clang-tidy fixes (again)

Bug: b/381128463 Test: m Change-Id: I35f889b38c9b795743dd0c4a7c5511a08e175f72

Author: Databean

host/commands/process_sandboxer/credentialed_unix_server.cpp

@@ -18,6 +18,8 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 
+#include <cerrno>
+#include <cstdio>
 #include <string>
 #include <utility>
 

host/commands/process_sandboxer/sandbox_manager.cpp

@@ -58,7 +58,6 @@
 #include <sandboxed_api/sandbox2/executor.h>
 #include <sandboxed_api/sandbox2/policy.h>
 #include <sandboxed_api/sandbox2/sandbox2.h>
-#include <sandboxed_api/sandbox2/util.h>
 #include <sandboxed_api/util/fileops.h>
 #include <sandboxed_api/util/path.h>
 #pragma clang diagnostic pop