Seekbar track background alpha should be disabledAlpha

        <shape android:shape="rectangle"

               android:tint="?attr/colorControlNormal">

            <size android:height="@dimen/seekbar_track_background_height_material" />

            <solid android:color="#ff000000" />

            <solid android:color="@color/white_disabled_material" />

        </shape>

    </item>

    <item android:id="@id/secondaryProgress"