The android.max_aspect only makes difference if your
android:resizeableActivity is not true. If your app's target API is 24 or higher android:resizeableActivity is set as true.
Note: You do not need to set a maximum aspect ratio if an activity's android:resizeableActivity attribute is set to true. If your app targets API level 24 or higher, this attribute defaults to true. For more information, see Configuring your app for multi-window mode.
Please refer to the
documentation.