themes: Add custom color options

This enables color picker option in ThemePicker which can be used
to choose from one of the 5 tonal palettes with 13 tonal color variants.

Issue: FP3-A13#5
Change-Id: Ib8b70cd1b3512f99acc4b70726dfcd7123446986
diff --git a/themes/res/values/arrays.xml b/themes/res/values/arrays.xml
index a827da0..25e6ba2 100755
--- a/themes/res/values/arrays.xml
+++ b/themes/res/values/arrays.xml
@@ -20,4 +20,12 @@
         <item>wallpaper_02</item>
         <item>wallpaper_03</item>
     </string-array>
+
+    <string-array name="color_bundles">
+        <item>default</item>
+        <item>color1</item>
+        <item>color2</item>
+        <item>color3</item>
+        <item>color4</item>
+    </string-array>
 </resources>