Proposed interface for "Connection ID generators" that will allow different algorithms for different platforms that deploy QUICHE.

PiperOrigin-RevId: 465123243
diff --git a/build/source_list.gni b/build/source_list.gni
index 5845102..ba93bf9 100644
--- a/build/source_list.gni
+++ b/build/source_list.gni
@@ -133,6 +133,7 @@
     "src/quiche/quic/core/congestion_control/tcp_cubic_sender_bytes.h",
     "src/quiche/quic/core/congestion_control/uber_loss_algorithm.h",
     "src/quiche/quic/core/congestion_control/windowed_filter.h",
+    "src/quiche/quic/core/connection_id_generator.h",
     "src/quiche/quic/core/crypto/aead_base_decrypter.h",
     "src/quiche/quic/core/crypto/aead_base_encrypter.h",
     "src/quiche/quic/core/crypto/aes_128_gcm_12_decrypter.h",