Add action divider and supplemental action functionality to list items.

Bug: 143234489
Test: CarUiListItemTest

Change-Id: Ic699068350516601e239d67296c415ce9ff33978
diff --git a/car-ui-lib/res/values/dimens.xml b/car-ui-lib/res/values/dimens.xml
index f71a4de..e025301 100644
--- a/car-ui-lib/res/values/dimens.xml
+++ b/car-ui-lib/res/values/dimens.xml
@@ -181,5 +181,8 @@
     <dimen name="car_ui_list_item_text_start_margin">0dp</dimen>
     <dimen name="car_ui_list_item_text_no_icon_start_margin">24dp</dimen>
     <dimen name="car_ui_list_item_icon_size">@dimen/car_ui_primary_icon_size</dimen>
+    <dimen name="car_ui_list_item_supplemental_icon_size">@dimen/car_ui_primary_icon_size</dimen>
     <dimen name="car_ui_list_item_icon_container_width">112dp</dimen>
+    <dimen name="car_ui_list_item_action_divider_width">1dp</dimen>
+    <dimen name="car_ui_list_item_action_divider_height">60dp</dimen>
 </resources>