Rename connection_id to server_connection_id

This is a step on the way to enabling client connection IDs. It will make the code less ambiguous once we introduce client_connection_id.

gfe-relnote: n/a, renaming code only
PiperOrigin-RevId: 249045070
Change-Id: Ia7ba75511f96c896bc6f0f4978dae2cd13e707fb
diff --git a/quic/core/quic_framer_test.cc b/quic/core/quic_framer_test.cc
index bf87ace..85af7ea 100644
--- a/quic/core/quic_framer_test.cc
+++ b/quic/core/quic_framer_test.cc
@@ -1011,8 +1011,8 @@
 
 TEST_P(QuicFramerTest, PacketHeaderWith0ByteConnectionId) {
   SetDecrypterLevel(ENCRYPTION_FORWARD_SECURE);
-  QuicFramerPeer::SetLastSerializedConnectionId(&framer_,
-                                                FramerTestConnectionId());
+  QuicFramerPeer::SetLastSerializedServerConnectionId(&framer_,
+                                                      FramerTestConnectionId());
   QuicFramerPeer::SetPerspective(&framer_, Perspective::IS_CLIENT);
 
   // clang-format off