Java to Kotlin converter: code refactorings after review

j2k/tests/testData/ast/constructors/artificialPrimary.java

@@ -0,0 +1,14 @@
+//file
+public class Test {
+  private final String s;
+  boolean b;
+  double d;
+
+  public Test() {
+    b = true;
+  }
+
+  public Test(String s) {
+    this.s = s;
+  }
+}