Was there a specialized unit for assembly at the enterprise?

Yes, many enterprises have a specialized unit responsible for software assembly — this is the build team. In the context of Android development, such a team automates the build process, supports CI/CD (continuous integration and delivery), configures build tools (e.g., Gradle), and ensures the quality and stability of builds. This allows developers to focus on writing code, while the build and deployment are centralized and standardized.