Use more standard Unicode notations in keyboard layout resource files.

bug: 5988656
Change-Id: Ie2416ccd790f29934a37e9dc77d7525e5113048a
diff --git a/java/res/xml-sw768dp/rows_symbols.xml b/java/res/xml-sw768dp/rows_symbols.xml
index c199ae4..d82f20b 100644
--- a/java/res/xml-sw768dp/rows_symbols.xml
+++ b/java/res/xml-sw768dp/rows_symbols.xml
@@ -140,9 +140,10 @@
             latin:moreKeys="@string/more_keys_for_comma" />
         <Key
             latin:keyLabel="." />
+        <!-- U+00A1: "¡" INVERTED EXCLAMATION MARK -->
         <Key
             latin:keyLabel="!"
-            latin:moreKeys="¡" />
+            latin:moreKeys="&#x00A1;" />
         <Key
             latin:keyLabel="@string/keylabel_for_symbols_question"
             latin:moreKeys="@string/more_keys_for_symbols_question" />