Java to Kotlin converter: supported try-with-resource construct, fixed anonymous class generation + fixed a bug with method return type

#KT-4488 Fixed

j2k/tests/testData/ast/newClassExpression/newAnonymousClass2.java

@@ -0,0 +1,13 @@
+//file
+abstract class A {}
+
+class C {
+    void foo() {
+        A a = new A() {
+            @Override
+            public String toString() {
+                return "a";
+            }
+        };
+    }
+}