In quic, use transport params to announce the support of handshake_done frame. protected by gfe2_reloadable_flag_quic_support_handshake_done_in_t050.

PiperOrigin-RevId: 316678561
Change-Id: Ice2b7d65a0422bdab383e84ed75c7edc31488a53
diff --git a/quic/core/quic_connection.h b/quic/core/quic_connection.h
index 8e3608b..7339b57 100644
--- a/quic/core/quic_connection.h
+++ b/quic/core/quic_connection.h
@@ -1670,6 +1670,9 @@
 
   bool blackhole_detection_disabled_ = false;
 
+  // True if this connection supports handshake done frame.
+  bool support_handshake_done_;
+
   const bool use_idle_network_detector_ =
       GetQuicReloadableFlag(quic_use_idle_network_detector);