Support loading methods from Java as common properties overrides

compiler/testData/codegen/boxWithJava/properties/commonProperties/J.java

@@ -0,0 +1,24 @@
+public class J extends A {
+
+    public boolean okField = false;
+
+    public int getValProp() {
+        return 123;
+    }
+
+    public int getVarProp() {
+        return 456;
+    }
+
+    public void setVarProp(int x) {
+        okField = true;
+    }
+
+    public int isProp() {
+        return 789;
+    }
+
+    public void setProp(int x) {
+        okField = true;
+    }
+}