Add colorControlActivated color to the seekbar theme

This ensures that the color of the seekbar progress is what we want.

BUG: 111568599
Test: manual

Change-Id: Iad24a49aaeb6a4d6aa9c0deaea0976fbfbd3bd76
(cherry picked from commit 2f91948d0f2250b8efb6e6c82e94ad621424b48e)
diff --git a/packages/CarSystemUI/res/values/styles.xml b/packages/CarSystemUI/res/values/styles.xml
index 22a699c..7f4544a 100644
--- a/packages/CarSystemUI/res/values/styles.xml
+++ b/packages/CarSystemUI/res/values/styles.xml
@@ -42,6 +42,7 @@
     </style>
 
     <style name="Theme.Car.DialogListView" parent="@style/Theme.Car.NoActionBar">
+        <item name="android:colorControlActivated">@color/car_accent</item>
         <item name="listItemBackgroundColor">@android:color/black</item>
     </style>