J2K: coversion of specially mapped built-in methods + replacing "get" with "[]" where possible

j2k/testData/fileOrElement/constructors/fieldsInitializedFromParams8.kt

@@ -1,3 +1,3 @@
 internal open class Base(o: Any, l: Int)
 
-internal class C(private val string: String) : Base(string, string.length())
+internal class C(private val string: String) : Base(string, string.length)

j2k/testData/fileOrElement/constructors/fieldsInitializedFromParams9.kt

@@ -1 +1 @@
-internal class C @JvmOverloads constructor(private val string: String, a: Int = string.length())
+internal class C @JvmOverloads constructor(private val string: String, a: Int = string.length)