Fix RecoversWithFlexfecAndNack flakiness

Change-Id: I350a37340e6df122c79fc5a9335f7d5608016897
Bug: webrtc:14758
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/287224
Commit-Queue: Jeremy Leconte <jleconte@google.com>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38860}

video/end_to_end_tests/fec_tests.cc

diff --git a/video/end_to_end_tests/fec_tests.cc b/video/end_to_end_tests/fec_tests.cc
index 03c966c..ff85dde 100644
--- a/video/end_to_end_tests/fec_tests.cc
+++ b/video/end_to_end_tests/fec_tests.cc
@@ -159,7 +159,7 @@
   static constexpr uint32_t kFlexfecLocalSsrc = 456;
 
   explicit FlexfecRenderObserver(bool enable_nack, bool expect_flexfec_rtcp)
-      : test::EndToEndTest(test::CallTest::kDefaultTimeout),
+      : test::EndToEndTest(test::CallTest::kLongTimeout),
         enable_nack_(enable_nack),
         expect_flexfec_rtcp_(expect_flexfec_rtcp),
         received_flexfec_rtcp_(false),