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_dispatcher_test.cc b/quic/core/quic_dispatcher_test.cc
index 46c5bc2..de06c52 100644
--- a/quic/core/quic_dispatcher_test.cc
+++ b/quic/core/quic_dispatcher_test.cc
@@ -156,7 +156,7 @@
   using QuicDispatcher::current_client_address;
   using QuicDispatcher::current_peer_address;
   using QuicDispatcher::current_self_address;
-  using QuicDispatcher::SetAllowShortInitialConnectionIds;
+  using QuicDispatcher::SetAllowShortInitialServerConnectionIds;
   using QuicDispatcher::writer;
 };
 
@@ -686,7 +686,7 @@
       QuicUtils::CreateRandomConnectionId(mock_helper_.GetRandomGenerator());
 
   // Disable validation of invalid short connection IDs.
-  dispatcher_->SetAllowShortInitialConnectionIds(true);
+  dispatcher_->SetAllowShortInitialServerConnectionIds(true);
   // Note that StrayPacketTruncatedConnectionId covers the case where the
   // validation is still enabled.