Set listDivider color for Panels

Default color for listDividers in dialogs (parent theme for
panels) is @null, so we set the color to match the horizontal
dividers. listDivider is used by slices to set the vertical
divider between the primary action and toggles.

Test: visual-only
Bug: 117804089
Change-Id: I8f89a103c65adfbd1e079b38dc5eaaa3d3b32326
diff --git a/res/values/themes.xml b/res/values/themes.xml
index 9a05bfc..390be584 100644
--- a/res/values/themes.xml
+++ b/res/values/themes.xml
@@ -202,10 +202,12 @@
         <item name="android:windowLightNavigationBar">true</item>
     </style>
 
+    <!-- Note that Dialog themes do not set list dividers -->
     <style name="Theme.BottomDialog" parent="@*android:style/Theme.DeviceDefault.Settings.Dialog">
         <item name="android:windowBackground">@drawable/settings_panel_background</item>
         <item name="android:dividerHorizontal">@*android:drawable/list_divider_material</item>
         <item name="android:windowNoTitle">true</item>
+        <item name="android:listDivider">@*android:drawable/list_divider_material</item>
         <item name="android:fontFamily">@*android:string/config_headlineFontFamilyMedium</item>
     </style>