Java to Kotlin converter: and even more smartness about nullability

#KT-5162 Fixed

j2k/tests/testData/ast/nullability/MethodInvokedWithNullArg2.java

@@ -0,0 +1,10 @@
+//file
+class C {
+    public void foo(String s){}
+}
+
+class D {
+    void bar(C c) {
+        c.foo(null);
+    }
+}