8230723: Remove default constructors from java.lang and java.io

Reviewed-by: bpb, rriggs

src/java.base/share/classes/java/io/ObjectOutputStream.java

@@ -879,6 +879,10 @@ public class ObjectOutputStream
      * @since 1.2
      */
     public abstract static class PutField {
+        /**
+         * Constructor for subclasses to call.
+         */
+        public PutField() {}
 
         /**
          * Put the value of the named boolean field into the persistent field.