Remove app:navGraph from xml

Since we set it through setGraph()

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

@@ -39,8 +39,7 @@
                 android:name="androidx.navigation.fragment.NavHostFragment"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
-                app:defaultNavHost="true"
-                app:navGraph="@navigation/nav_graph" />
+                app:defaultNavHost="true" />
         </com.hippo.ehviewer.widget.AboveSnackerLayout>
     </androidx.coordinatorlayout.widget.CoordinatorLayout>