As mentioned in Android Developers Blog,
Account hold is a state the user enters after a renewal fails due to a
payment issue. During account hold, the user loses access to the
subscription while Google notifies the user and retries the payment
method.Restore enables users to resume auto-renewals after they have
canceled the subscription but before the subscription expires.
So you have to make changes only if you have subscriptions in your app and using Google Play Billing to manage them.
!! Please notice that in the new payments policy, Google enforces the app providers to use Google Play’s billing system if they are selling subscriptions, virtual items, app features, or cloud services.