Unable to make DrawerLayout background to transparent in Samsung s8+

I am using DrawerLayout in my application. I am using NavigationView for the contents of the navigation drawer and setting its background to transparent using below code snip.

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="start|center"
    android:background="@android:color/transparent">

</android.support.design.widget.NavigationView>

In Samsung s8+ when I open the drawer it shows a vertical bar at the end. While debugging when I removed transparency from NavigationView what I come to know that Samsung s8+ contain a grey color bar in addition with a background. When I deploy the same code on Red mi 3s it's working fine it just has a background.

Samsung s8+ drawer bg

Redmi 3s drawer bg

Samsung s8+ drawer bg transparent

Redmi 3s drawer bg transparent

Please help me to remove this vertical bar.

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