Summary
-------

Add a default constructor for StreamPrintServiceFactory.java
Problem
-------

Default constructors are an anti--pattern which we need to fix in the desktop module. This is one case that was missed in a previous pass.

Solution
--------
Add a default constructor

Specification
-------------

<pre>
public abstract class javax.print.StreamPrintServiceFactory {

+    /**
+     * Constructor for subclasses to call.
+     */
+     protected StreamPrintServiceFactory() {}
+

</pre>