[Cast] Address post-hoc feedback from f033388

This patch addresses a minor nit from the following code review:

https://chromium-review.googlesource.com/c/chromium/src/+/2809316

Change-Id: Icdd733c44606e17c76e38d2f1388b09b0c9edc72
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2821597
Commit-Queue: Jordan Bayles <jophba@chromium.org>
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: Fabrice de Gans-Riberi <fdegans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#871523}

fuchsia/cast_streaming/test/cast_streaming_test_sender.cc

@@ -83,7 +83,8 @@ bool CastStreamingTestSender::Start(
   sender_session_ = std::make_unique<openscreen::cast::SenderSession>(
       openscreen::cast::SenderSession::Configuration{
           openscreen::IPAddress::kV6LoopbackAddress(), this, &environment_,
-          message_port_.get(), kSenderId, kReceiverId, true});
+          message_port_.get(), kSenderId, kReceiverId,
+          true /* use_android_rtp_hack */});
 
   std::vector<openscreen::cast::AudioCaptureConfig> audio_configs;
   if (audio_config) {