Send correct STOP_SENDING/RESET_STREAM frames for different stream types.

Upon receiving RESET_STREAM for a write-only stream, the connection will be closed with error.

gfe-relnote: protected by disabled v99 flag.
PiperOrigin-RevId: 279850700
Change-Id: I9f0e6215a388dac226d430458a340e8934432662
diff --git a/quic/core/quic_stream.h b/quic/core/quic_stream.h
index de0f619..c936bc7 100644
--- a/quic/core/quic_stream.h
+++ b/quic/core/quic_stream.h
@@ -336,6 +336,9 @@
   // this method or not.
   void SendStopSending(uint16_t code);
 
+  // Handle received StopSending frame.
+  virtual void OnStopSending(uint16_t /*code*/) {}
+
   // Close the write side of the socket.  Further writes will fail.
   // Can be called by the subclass or internally.
   // Does not send a FIN.  May cause the stream to be closed.