Use more standard Unicode notations in keyboard layout resource files.

bug: 5988656
Change-Id: Ie2416ccd790f29934a37e9dc77d7525e5113048a
diff --git a/java/res/xml-sw600dp/rows_spanish.xml b/java/res/xml-sw600dp/rows_spanish.xml
index d7af5b1..b6df257 100644
--- a/java/res/xml-sw600dp/rows_spanish.xml
+++ b/java/res/xml-sw600dp/rows_spanish.xml
@@ -53,9 +53,9 @@
         <Key
             latin:keyLabel="l"
             latin:moreKeys="@string/more_keys_for_l" />
-        <!-- \u00f1: "ñ" LATIN SMALL LETTER N WITH TILDE -->
+        <!-- U+00F1: "ñ" LATIN SMALL LETTER N WITH TILDE -->
         <Key
-            latin:keyLabel="\u00f1" />
+            latin:keyLabel="&#x00F1;" />
         <Key
             latin:keyStyle="enterKeyStyle"
             latin:keyXPos="-14.6%p"