[build] Include ostream in quic_ip_address.h

Explicitly #include <ostream> in quic/platform/api/quic_ip_address.h, since std::ostream is referenced in it. In the C++ STL shipped with Visual Studio 2019, none of the headers included in quic_ip_address.h ends up including the required templates, which caused a compile error.

Patch by Jaime Bernardo <jaime@janeasystems.com>: https://quiche-review.googlesource.com/c/quiche/+/10280

gfe-relnote: n/a (no functional change)
PiperOrigin-RevId: 272678937
Change-Id: I304ed7ad7f114924268ef832551fb2ddcba73402

quic/platform/api/quic_ip_address.h

diff --git a/quic/platform/api/quic_ip_address.h b/quic/platform/api/quic_ip_address.h
index e1a1076..3585970 100644
--- a/quic/platform/api/quic_ip_address.h
+++ b/quic/platform/api/quic_ip_address.h
@@ -15,6 +15,7 @@
 #include <sys/types.h>
 #endif
 
+#include <ostream>
 #include <string>
 
 #include "net/third_party/quiche/src/quic/platform/api/quic_export.h"