Use more standard Unicode notations in keyboard layout resource files.

bug: 5988656
Change-Id: Ie2416ccd790f29934a37e9dc77d7525e5113048a
diff --git a/java/res/xml/rows_symbols.xml b/java/res/xml/rows_symbols.xml
index 81a9a46..05699e0 100644
--- a/java/res/xml/rows_symbols.xml
+++ b/java/res/xml/rows_symbols.xml
@@ -103,9 +103,10 @@
             latin:keyStyle="toMoreSymbolKeyStyle"
             latin:keyWidth="15%p"
             latin:visualInsetsRight="1%p" />
+        <!-- U+00A1: "¡" INVERTED EXCLAMATION MARK -->
         <Key
             latin:keyLabel="!"
-            latin:moreKeys="¡" />
+            latin:moreKeys="&#x00A1;" />
         <Key
             latin:keyLabel="&quot;"
             latin:moreKeys="@string/more_keys_for_double_quote"