java/com/android/incallui/audioroute/res/values/styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

  <style name="AudioRouteItem">
    <item name="android:padding">16dp</item>
    <item name="android:background">?android:selectableItemBackground</item>
    <item name="android:drawablePadding">24dp</item>
    <item name="android:gravity">center_vertical</item>
    <item name="android:textAppearance">
      @style/TextAppearance.AppCompat.Light.Widget.PopupMenu.Large
    </item>
    <item name="android:textColor">?android:textColorSecondary</item>
  </style>
</resources>