7 files declare their use of ActivityFactory in Open Social 8.7

ActivityWorkerActivities.php in modules/custom/activity_creator/src/Plugin/QueueWorker/ActivityWorkerActivities.php

ContentInMyGroupActivityContext.php in modules/custom/activity_basics/src/Plugin/ActivityContext/ContentInMyGroupActivityContext.php

FollowContentActivityContext.php in modules/social_features/social_follow_content/src/Plugin/ActivityContext/FollowContentActivityContext.php

GroupContentInMyGroupActivityContext.php in modules/custom/activity_basics/src/Plugin/ActivityContext/GroupContentInMyGroupActivityContext.php

OrganizerActivityContext.php in modules/custom/activity_basics/src/Plugin/ActivityContext/OrganizerActivityContext.php

OwnerActivityContext.php in modules/custom/activity_basics/src/Plugin/ActivityContext/OwnerActivityContext.php

ProfileActivityContext.php in modules/custom/activity_basics/src/Plugin/ActivityContext/ProfileActivityContext.php