Add << operator for QUIC Encryption levels to make debugging easier.

No behavior change. not protected.

PiperOrigin-RevId: 313501790
Change-Id: Id4a831d0449489ee18dbd348545de914acf59cbf
diff --git a/quic/core/frames/quic_crypto_frame.cc b/quic/core/frames/quic_crypto_frame.cc
index 81b3e18..bef5f28 100644
--- a/quic/core/frames/quic_crypto_frame.cc
+++ b/quic/core/frames/quic_crypto_frame.cc
@@ -32,8 +32,7 @@
 
 std::ostream& operator<<(std::ostream& os,
                          const QuicCryptoFrame& stream_frame) {
-  os << "{ level: " << EncryptionLevelToString(stream_frame.level)
-     << ", offset: " << stream_frame.offset
+  os << "{ level: " << stream_frame.level << ", offset: " << stream_frame.offset
      << ", length: " << stream_frame.data_length << " }\n";
   return os;
 }