InCallUI: Fix background colour of tabs on DSDA phones

    <style name="InCallActionBarStyle" parent="@android:style/Widget.Material.Light.ActionBar">

        <item name="android:background">@color/incall_action_bar_background_color</item>

        <item name="android:backgroundStacked">@color/incall_banner_secondary_background_color</item>

        <item name="android:textColor">@color/incall_action_bar_text_color</item>

    </style>