Fix the issue for #2025

Author: gefeili

core/src/main/java/org/bouncycastle/crypto/engines/PhotonBeetleEngine.java

@@ -116,7 +116,7 @@ protected void finishAAD(State nextState, boolean isDoFinal)
         m_state = nextState;
     }
 
-    public void processFinalAAD()
+    protected void processFinalAAD()
     {
         int aadLen = aadOperator.getLen();
         if (aadLen != 0)

core/src/main/java/org/bouncycastle/crypto/engines/RomulusEngine.java

@@ -855,7 +855,7 @@ static void hirose_128_128_256(byte[] h, byte[] g, byte[] m, int mOff)
     }
 
     @Override
-    public void init(byte[] key, byte[] iv)
+    protected void init(byte[] key, byte[] iv)
         throws IllegalArgumentException
     {
         npub = iv;

core/src/main/java/org/bouncycastle/crypto/engines/XoodyakEngine.java

@@ -43,7 +43,7 @@ public XoodyakEngine()
     }
 
     @Override
-    public void init(byte[] key, byte[] iv)
+    protected void init(byte[] key, byte[] iv)
         throws IllegalArgumentException
     {
         K = key;