Add Material Light theme

Bug: 15782668
Change-Id: Id2ae47cfb2065d73f13701b9c6a041129dfd08ae
diff --git a/java/res/values/keyboard-themes.xml b/java/res/values/keyboard-themes.xml
index 28a34c3..9d772c4 100644
--- a/java/res/values/keyboard-themes.xml
+++ b/java/res/values/keyboard-themes.xml
@@ -20,15 +20,15 @@
 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <!-- For keyboard color scheme option dialog. -->
     <string-array name="keyboard_theme_names" translatable="false">
-        <!-- TODO: Implement Material Light theme. -->
+        <item>@string/keyboard_theme_material_light</item>
         <item>@string/keyboard_theme_material_dark</item>
         <item>@string/keyboard_theme_holo_white</item>
         <item>@string/keyboard_theme_holo_blue</item>
     </string-array>
     <!-- An element must be a keyboard theme id of {@link KeyboardTheme#THEME_ID_*}. -->
     <string-array name="keyboard_theme_ids" translatable="false">
-        <!-- TODO: Implement Material Light theme. -->
         <item>3</item>
+        <item>4</item>
         <item>2</item>
         <item>0</item>
     </string-array>