gfe-relnote: In QUIC, add unused HANDSHAKE encryption level. No functional change expected, not protected.

PiperOrigin-RevId: 238661434
Change-Id: Ia1e1d2be2d6a46f3981afae6628877242fbabf24
diff --git a/quic/core/tls_handshaker.cc b/quic/core/tls_handshaker.cc
index d6207bb..2b6c83f 100644
--- a/quic/core/tls_handshaker.cc
+++ b/quic/core/tls_handshaker.cc
@@ -118,6 +118,7 @@
   switch (level) {
     case ENCRYPTION_NONE:
       return ssl_encryption_initial;
+    case ENCRYPTION_HANDSHAKE:
     case ENCRYPTION_ZERO_RTT:
       return ssl_encryption_handshake;
     case ENCRYPTION_FORWARD_SECURE: