message: Use F14NodeMap to store stream state.
  Summary: We don't need this to be sorted. It would be nice if we could use `F14FastMap` instead, but then we'd have to make it so the stream state is move-constructible which it is not right now.
diff: #pragma once
  +#include <folly/container/F14Map.h>
  +#include <folly/container/F14Set.h>
  #include <quic/QuicConstants.h>
  #include <quic/codec/Types.h>
  #include <quic/state/StreamData.h>
  @@ -746,7 +748,7 @@ class QuicStreamManager {
  std::deque<StreamId> openLocalStreams_;
  // A map of streams that are active.
  - std::map<StreamId, QuicStreamState> streams_;
  + folly::F14NodeMap<StreamId, QuicStreamState> streams_;
  std::deque<StreamId> newPeerStreams_;
  