Add IP/UDP packet generation to QUIC test tools

PiperOrigin-RevId: 590635487

build/source_list.json

diff --git a/build/source_list.json b/build/source_list.json
index 4b1ae54..252c803 100644
--- a/build/source_list.json
+++ b/build/source_list.json
@@ -846,6 +846,7 @@
     "quiche/quic/test_tools/simulator/test_harness.h",
     "quiche/quic/test_tools/simulator/traffic_policer.h",
     "quiche/quic/test_tools/test_certificates.h",
+    "quiche/quic/test_tools/test_ip_packets.h",
     "quiche/quic/test_tools/test_ticket_crypter.h",
     "quiche/quic/test_tools/web_transport_resets_backend.h",
     "quiche/quic/test_tools/web_transport_test_tools.h",
@@ -940,6 +941,7 @@
     "quiche/quic/test_tools/simulator/test_harness.cc",
     "quiche/quic/test_tools/simulator/traffic_policer.cc",
     "quiche/quic/test_tools/test_certificates.cc",
+    "quiche/quic/test_tools/test_ip_packets.cc",
     "quiche/quic/test_tools/test_ticket_crypter.cc",
     "quiche/quic/test_tools/web_transport_resets_backend.cc",
     "quiche/spdy/test_tools/mock_spdy_framer_visitor.cc",
@@ -1293,6 +1295,7 @@
     "quiche/quic/test_tools/simple_session_notifier_test.cc",
     "quiche/quic/test_tools/simulator/quic_endpoint_test.cc",
     "quiche/quic/test_tools/simulator/simulator_test.cc",
+    "quiche/quic/test_tools/test_ip_packets_test.cc",
     "quiche/quic/tools/connect_tunnel_test.cc",
     "quiche/quic/tools/connect_udp_tunnel_test.cc",
     "quiche/quic/tools/quic_memory_cache_backend_test.cc",