Add support for HFS handshakes

Author: jchambers

src/main/java/com/eatthepath/noise/HandshakePattern.java

@@ -815,6 +815,10 @@ boolean requiresRemoteStaticPublicKey(final NoiseHandshake.Role role) {
         .anyMatch(token -> token == Token.S);
   }
 
+  boolean requiresKeyEncapsulationMechanism() {
+    return getModifiers(getName()).contains("hfs");
+  }
+
   @Override
   public String toString() {
     final StringBuilder stringBuilder = new StringBuilder(getName() + ":\n");

src/main/java/com/eatthepath/noise/NamedProtocolHandshakeBuilder.java

@@ -205,11 +205,14 @@ public NoiseHandshake build() {
         keyAgreement,
         cipher,
         hash,
+        null,
         prologue,
         localStaticKeyPair,
         localEphemeralKeyPair,
+        null,
         remoteStaticPublicKey,
         null,
+        null,
         preSharedKeys);
   }
 }