[Java] Fix Kryo FP & Kryo 5 Support

Closes #4992

java/ql/test/stubs/kryo-4.0.2/com/esotericsoftware/kryo/pool/KryoCallback.java

@@ -0,0 +1,7 @@
+package com.esotericsoftware.kryo.pool;
+
+import com.esotericsoftware.kryo.Kryo;
+
+public interface KryoCallback<T> {
+	T execute (Kryo kryo);
+}

java/ql/test/stubs/kryo-4.0.2/com/esotericsoftware/kryo/pool/KryoFactory.java

@@ -0,0 +1,7 @@
+package com.esotericsoftware.kryo.pool;
+
+import com.esotericsoftware.kryo.Kryo;
+
+public interface KryoFactory {
+	Kryo create ();
+}

java/ql/test/stubs/kryo-4.0.2/com/esotericsoftware/kryo/pool/KryoPool.java

@@ -0,0 +1,30 @@
+package com.esotericsoftware.kryo.pool;
+
+import com.esotericsoftware.kryo.Kryo;
+import java.util.Queue;
+
+public interface KryoPool {
+
+    Kryo borrow ();
+
+    void release (Kryo kryo);
+
+    <T> T run (KryoCallback<T> callback);
+
+    static class Builder {
+        public Builder (KryoFactory factory) {
+        }
+    
+        public Builder queue (Queue<Kryo> queue) {
+            return null;
+        }
+    
+        public Builder softReferences () {
+            return null;
+        }
+    
+        public KryoPool build () {
+            return null;
+        }
+    }
+}