I don’t know exactly what that machine is used for, but I suppose it has something to do with the Facebook SDK.
In SDK version 36 the Facebook SDK needs to be initialized manually if you use it. In 35 and earlier versions it is initialized automatically.
Given your question I suspect you are not using the Facebook SDK, so I suggest you try SDK 36. Then I think your app should not contact Facebook’s servers.
Here’s the relevant part of the release notes.
API improvements and additions
Facebook module initialization
To prevent unintended data collection, the
Facebook module no longer auto-initializes when your app starts up. If your app uses Facebook login, you must initialize the Facebook SDK manually, either at runtime or with an app.json setting, before calling
logInWithReadPermissionsAsync . See the docs for more information.