official google answer about this:
“Please note that changing permissions between versions of applications will not prevent users from being notified of an update. The only difference is that users must manually accept the new permission requirements when Google Play notifies them that the update is available. In other words , the update will not be automatically installed, but users will still be notified.
In this particular case, all users who have updated the new version have already accepted the changes in permissions. In addition, the return of rights in a future update will require that the updated users accept the new permissions again (this is probably not a problem since they accepted the previous change). In addition, all users who have not accepted the permission and will remain in the old version will be automatically updated to the latest version if the permissions are identical.