shutdown

Shuts the SDK down: cancels its in-flight content requests and leaves it uninitialized.

Rarely needed — an SDK initialized in Application.onCreate is meant to live as long as the process. Reach for this only where the SDK's lifetime is genuinely shorter than the app's, or in tests between cases.

Services obtained before this call must not be used after it, and every accessor on CGS throws InitializationException again until init runs a second time. Downloads already written to disk survive. A download still in progress is not stopped by this call.