c-ares: include <sys/select.h> when building in Android

Include <sys/select.h> when building in Android, since fd_set,
which is used in ares.h, is defined in bionic's sys/select.h.

BUG: None
Change-Id: Ib4a11095cb24eb45d7f5dc396319a2f0eee828c0
diff --git a/ares.h b/ares.h
index 2b38303..ccf6987 100644
--- a/ares.h
+++ b/ares.h
@@ -37,7 +37,8 @@
    libc5-based Linux systems. Only include it on system that are known to
    require it! */
 #if defined(_AIX) || defined(__NOVELL_LIBC__) || defined(__NetBSD__) || \
-    defined(__minix) || defined(__SYMBIAN32__) || defined(__INTEGRITY)
+    defined(__minix) || defined(__SYMBIAN32__) || defined(__INTEGRITY) || \
+    defined(__ANDROID__)
 #include <sys/select.h>
 #endif
 #if (defined(NETWARE) && !defined(__NOVELL_LIBC__))