Notification settings cog button ripple under notification

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<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/ripple_drawable"/>

    <item android:drawable="@drawable/ic_settings"/>

</layer-list>

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            android:layout_width="@dimen/notification_importance_toggle_size"

            android:layout_height="@dimen/notification_importance_toggle_size"

            android:layout_centerVertical="true"

            android:background="@drawable/ripple_drawable"

            android:background="@android:color/transparent"

            android:contentDescription="@string/notification_more_settings"

            android:src="@drawable/ic_settings"

            android:src="@drawable/notif_settings_button"

            android:layout_alignParentEnd="true"

            android:tint="@color/notification_guts_link_icon_tint"/>