fix: background color of BottomNavigationViw

app/src/main/res/layout/activity_main.xml

@@ -36,6 +36,7 @@
             android:paddingStart="24dp"
             android:paddingEnd="24dp"
             android:visibility="gone"
+            android:background="?attr/colorSurface"
             app:menu="@menu/bottom_nav_menu" />
 
     </androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/menu/bottom_nav_menu.xml

@@ -12,4 +12,4 @@
         android:id="@+id/downloadFragment"
         android:icon="@drawable/ic_play_for_work"
         android:title="@string/menu_download_label" />
-</menu>
+</menu>