Add a flag count for --gfe2_restart_flag_quic_tls_prefer_server_cipher_and_curve_list.

PiperOrigin-RevId: 351801752
Change-Id: I31b4306804e78c1e86669cefd8110a8aacaa5e23

quic/core/crypto/tls_server_connection.cc

diff --git a/quic/core/crypto/tls_server_connection.cc b/quic/core/crypto/tls_server_connection.cc
index fcabf72..f4d0ac2 100644
--- a/quic/core/crypto/tls_server_connection.cc
+++ b/quic/core/crypto/tls_server_connection.cc
@@ -44,6 +44,7 @@
   SSL_CTX_set_select_certificate_cb(
       ssl_ctx.get(), &TlsServerConnection::EarlySelectCertCallback);
   if (GetQuicRestartFlag(quic_tls_prefer_server_cipher_and_curve_list)) {
+    QUIC_RESTART_FLAG_COUNT(quic_tls_prefer_server_cipher_and_curve_list);
     SSL_CTX_set_options(ssl_ctx.get(), SSL_OP_CIPHER_SERVER_PREFERENCE);
   }
   return ssl_ctx;