New J2K: Fix existing test data

j2k/testData/fileOrElement/settings/specifyFieldTypeByDefault.new.kt

@@ -1,8 +1,8 @@
-import java.util.ArrayList
+import java.util.*
 
 internal class A {
-    private val field1: List<String?> = ArrayList()
-    val field2: List<String?> = ArrayList()
+    private val field1: List<String> = ArrayList()
+    val field2: List<String> = ArrayList()
     val field3: Int = 0
     protected val field4: Int = 0
 }