Replace UTF-8 string resources with their hex representations

bug: 5988656
Change-Id: Ifc3c3a2eccfc23d75b4066c2c9c02c48dacda55b
diff --git a/java/res/xml-sw600dp/rows_spanish.xml b/java/res/xml-sw600dp/rows_spanish.xml
index 2ab94e8..d7af5b1 100644
--- a/java/res/xml-sw600dp/rows_spanish.xml
+++ b/java/res/xml-sw600dp/rows_spanish.xml
@@ -53,8 +53,9 @@
         <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" />
         <Key
             latin:keyStyle="enterKeyStyle"
             latin:keyXPos="-14.6%p"