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>