Use more standard Unicode notations in keyboard layout resource files.

bug: 5988656
Change-Id: Ie2416ccd790f29934a37e9dc77d7525e5113048a
diff --git a/java/res/values/strings.xml b/java/res/values/strings.xml
index 525b775..c8b6421 100644
--- a/java/res/values/strings.xml
+++ b/java/res/values/strings.xml
@@ -182,7 +182,7 @@
     <string name="spoken_description_smiley">Smiley face</string>
     <!-- Spoken description for the "Return" keyboard key. -->
     <string name="spoken_description_return">Return</string>
-    <!-- Spoken description for the "\u2022" (BULLET) keyboard key. -->
+    <!-- Spoken description for the "U+2022" (BULLET) keyboard key. -->
     <string name="spoken_description_dot">Dot</string>
 
     <!-- Spoken feedback after turning "Shift" mode on. -->
@@ -301,7 +301,7 @@
     <string name="select_language">Input languages</string>
 
     <!-- Add to dictionary hint -->
-    <string name="hint_add_to_dictionary">\u2190 Touch again to save</string>
+    <string name="hint_add_to_dictionary">&#x2190; Touch again to save</string>
 
     <!-- Inform the user that a particular language has an available dictionary -->
     <string name="has_dictionary">Dictionary available</string>