J2K: adapted for default visibility modifier 'public'

j2k/testData/fileOrElement/constructors/privateConstructors.kt

@@ -1,5 +1,5 @@
-class C private constructor(arg1: Int, arg2: Int, arg3: Int = 0) {
+internal class C private constructor(arg1: Int, arg2: Int, arg3: Int = 0) {
 
-    public constructor(arg1: Int) : this(arg1, 0, 0) {
+    constructor(arg1: Int) : this(arg1, 0, 0) {
     }
 }