<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="BottomBarItem">
        <item name="android:background">?android:selectableItemBackground</item>
    </style>
</resources>
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="BottomBarItem">
        <item name="android:background">@null</item>
    </style>
</resources>
Remove selectable tab background for <21 devices
Remove selectable tab background for <21 devices
