Improve logs with stream IDs

This CL improves our logging to facilitate debugging of test failures.

gfe-relnote: n/a, log-only
PiperOrigin-RevId: 304500766
Change-Id: I29ec300881e9c7b9b43f6f6e0892ee685d8df253
diff --git a/quic/core/quic_session.cc b/quic/core/quic_session.cc
index 5376bfd..bd29b8e 100644
--- a/quic/core/quic_session.cc
+++ b/quic/core/quic_session.cc
@@ -1477,7 +1477,7 @@
   QuicStreamId stream_id = stream->id();
   bool is_static = stream->is_static();
   QUIC_DVLOG(1) << ENDPOINT << "num_streams: " << stream_map_.size()
-                << ". activating " << stream_id;
+                << ". activating stream " << stream_id;
   DCHECK(!QuicContainsKey(stream_map_, stream_id));
   stream_map_[stream_id] = std::move(stream);
   if (IsIncomingStream(stream_id)) {