Unfortunately, at this stage AppBuilder projects cannot be built in TFS. This is so, due to many reasons. For example, you cannot log in to our system within TFS and there is no way to start a cloud build. This said, I will recommend you to disable the automatic builds, after check ins on your side. This will allow you to at least use TFS as a repository, where the sources of your applications are stored.
Further, we are currently thinking of a way to allow AppBuilder projects for continues integration, so your feedback is greatly appreciated. Please, let us know if you want to share more about what exactly you want to achieve and which approach will suit you most. You can also use our Ideas and Feedback portal
for that purpose.