Replace UTF-8 string resources with their hex representations

bug: 5988656
Change-Id: Ifc3c3a2eccfc23d75b4066c2c9c02c48dacda55b
diff --git a/java/res/xml/rows_spanish.xml b/java/res/xml/rows_spanish.xml
index 4b4cb9d..5fc2a00 100644
--- a/java/res/xml/rows_spanish.xml
+++ b/java/res/xml/rows_spanish.xml
@@ -52,8 +52,9 @@
         <Key
             latin:keyLabel="l"
             latin:moreKeys="@string/more_keys_for_l" />
+        <!-- \u00f1: "ñ" LATIN SMALL LETTER N WITH TILDE -->
         <Key
-            latin:keyLabel="ñ" />
+            latin:keyLabel="\u00f1" />
     </Row>
     <include
         latin:keyboardLayout="@xml/row_qwerty3" />