Java to Kotlin converter: declaring locals as var's in most of cases when needed, dropped forceLocalVariableImmutability setting

j2k/tests/testData/ast/labelStatement/complicatedExampleFromJavaTutorial.kt

@@ -1,7 +1,7 @@
 @test for (i in 0..max) {
-    val n = substring.length()
-    val j = i
-    val k = 0
+    var n = substring.length()
+    var j = i
+    var k = 0
     while (n-- != 0) {
         if (searchMe.charAt(j++) != substring.charAt(k++)) {
             continue@test