test(java-oracle): measure the getter defaults XMLEncoder refers to

XMLEncoder shares equal Integer objects, so a node's x coordinate can be
written as a reference to the result of JSidebarButton.getIconTextGap().
GetterDefaults constructs the classes like XMLDecoder does and records
what the getters return (packages/fls/src/javaDefaults.json).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/fls/src/javaDefaults.json

@@ -0,0 +1,17 @@
+{
+  "DHCPServer#port": 67,
+  "DNSServer#port": 53,
+  "Gateway#maxLayerOfOperation": 2,
+  "JSidebarButton#debugGraphicsOptions": 0,
+  "JSidebarButton#displayedMnemonicIndex": -1,
+  "JSidebarButton#enabled": true,
+  "JSidebarButton#iconTextGap": 4,
+  "JSidebarButton#verticalTextPosition": 3,
+  "Notebook#maxLayerOfOperation": 4,
+  "RIPServer#port": 520,
+  "Rechner#maxLayerOfOperation": 4,
+  "ServerBaustein#port": 55555,
+  "ThreadGroup#maxPriority": 10,
+  "Vermittlungsrechner#maxLayerOfOperation": 2,
+  "WebServer#port": 80
+}