Both of Flutter audio service and FCM need to change the android name. How can I integrate it?

Flutter audio service need to change the android:name like this

android:name="com.ryanheise.audioservice.AudioServiceActivity"

package and documation

Firebase Cloud Messaging also need to change the android:name like this

android:name=".Application"

package and documation

How can I make change to use both packages in my application?

Edited

Now I have solved the problem by upgrading flutter version but I would like to know how do I make change if I meet a situation like my question. If anyone has a solution for my question, let me know it please.