Add back XExampleAddIn methods

...erroneously removed by 34bcf9b498 "java: remove
dead methods"

Change-Id: I3a6dc7b08af2097f15779a5116d04dd0c80429ec

odk/examples/DevelopersGuide/Spreadsheet/ExampleAddIn.java

@@ -163,9 +163,30 @@ public class ExampleAddIn
 
         //  XExampleAddIn
 
+        public int getIncremented( int nValue )
+        {
+            return nValue + 1;
+        }
 
+        public com.sun.star.sheet.XVolatileResult getCounter(String aName)
+        {
+            if ( aResults == null )
+            {
+                // create the table of results, and start a thread to increment
+                // all counters
+                aResults = new java.util.HashMap<String, ExampleAddInResult>();
+                ExampleAddInThread aThread = new ExampleAddInThread( aResults );
+                aThread.start();
+            }
 
-
+            ExampleAddInResult aResult = aResults.get(aName);
+            if ( aResult == null )
+            {
+                aResult = new ExampleAddInResult(aName);
+                aResults.put( aName, aResult );
+            }
+            return aResult;
+        }
 
         //  XAddIn