Need a feature to disable datastore sync

### Before opening, please confirm:

- [X] I have [searched for duplicate or closed issues](https://github.com/aws-amplify/amplify-android/issues?q=is%3Aissue+) and [discussions](https://github.com/aws-amplify/amplify-android/discussions).

### Language and Async Model

Java

### Amplify Categories

DataStore

### Describe the feature request

I found there is no option to stop sync means I jsut want to save my models in local DB in place of SQLite room or realm. Datastore is great for storing them as will as reliable. I jsut want to query through API and then store into local DB using database. After user consumes the data I want to cear that from database.

The request names Amplify Android DataStore but no files, tests, or entry points. First clarify whether sync should be disabled globally or per model, how API-fetched data should be stored and queried, and when records should be cleared; done should include an agreed API and documented offline-only behavior.

Written by the indexing model from the issue text.