New J2K: add plain text copy-paste conversion test for new J2K

nj2k/testData/copyPastePlainText/IntoStringLiteral.expected.kt

@@ -0,0 +1,4 @@
+fun foo() {
+    val v = "ArrayList<String> list = new ArrayList<String>();\n" +
+            "// NO_CONVERSION_EXPECTED\n"
+}