New J2K: do not convert Java string type to a Kotlin one because of wrong constructor calls

nj2k/src/org/jetbrains/kotlin/nj2k/conversions/TypeMappingConversion.kt

@@ -141,9 +141,11 @@ class TypeMappingConversion(val context: NewJ2kConverterContext) : RecursiveAppl
     }
 
     private fun JKClassSymbol.kotlinStandardType(): String? =
-        fqName?.let {
+        fqName.takeIf {
+            it !in ignoredJavaFqNames
+        }?.let {
             JavaToKotlinClassMap.mapJavaToKotlin(FqName(it))?.asString()
-        }
+        } ?: fqName
 
     private fun JKJavaPrimitiveType.mapPrimitiveType(): JKClassType {
         val fqName = jvmPrimitiveType.primitiveType.typeFqName
@@ -162,4 +164,10 @@ class TypeMappingConversion(val context: NewJ2kConverterContext) : RecursiveAppl
             else -> false
         }
     }
+
+    companion object {
+        val ignoredJavaFqNames = setOf(
+            "java.lang.String"
+        )
+    }
 }