In quic, adjust blackhole detection configs based on connection options. protected by existing gfe2_reloadable_flag_quic_default_enable_5rto_blackhole_detection.

Connection options include 2RTO, 3RTO, 4RTO, 6RTO and client only blackhole detection.

PiperOrigin-RevId: 315280821
Change-Id: I21a8f6fc101412a83794821a265c9e312a89b6d8
diff --git a/quic/core/quic_connection.h b/quic/core/quic_connection.h
index 6bd0d38..5d149b4 100644
--- a/quic/core/quic_connection.h
+++ b/quic/core/quic_connection.h
@@ -1673,6 +1673,8 @@
 
   QuicIdleNetworkDetector idle_network_detector_;
 
+  bool blackhole_detection_disabled_ = false;
+
   const bool use_idle_network_detector_ =
       GetQuicReloadableFlag(quic_use_idle_network_detector);