Disable VideoSendStreamTest.RelayToDirectRoute due to flakiness

Bug: webrtc:13353
Change-Id: Ia8dc28c8a14622c7aaac99415422a96cf0555290
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/240181
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35512}
diff --git a/video/video_send_stream_tests.cc b/video/video_send_stream_tests.cc
index 23f9faa..f948b03 100644
--- a/video/video_send_stream_tests.cc
+++ b/video/video_send_stream_tests.cc
@@ -1665,7 +1665,8 @@
 
 // Test that if specified, relay cap is lifted on transition to direct
 // connection.
-TEST_F(VideoSendStreamTest, RelayToDirectRoute) {
+// TODO(https://bugs.webrtc.org/13353): Test disabled  due to flakiness.
+TEST_F(VideoSendStreamTest, DISABLED_RelayToDirectRoute) {
   static const int kStartBitrateBps = 300000;
   static const int kRelayBandwidthCapBps = 800000;
   static const int kMinPacketsToSend = 100;