deps: add missing ares_android.h file

This file was left out of the c-ares 1.14.0 update.

PR-URL: #23682
Fixes: #23681
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

deps/cares/src/ares_android.h

@@ -0,0 +1,26 @@
+/* Copyright (C) 2017 by John Schember <john@nachtimwald.com>
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#ifndef __ARES_ANDROID_H__
+#define __ARES_ANDROID_H__
+
+#if defined(ANDROID) || defined(__ANDROID__)
+
+char **ares_get_android_server_list(size_t max_servers, size_t *num_servers);
+void ares_library_cleanup_android(void);
+
+#endif
+
+#endif /* __ARES_ANDROID_H__ */