Add new Tests and Demo for MASWE-0006 using Android Room DB

[bernhste]

See #3420

RoomDB (https://developer.android.com/training/data-storage/room) is an SQL abstraction used for relational data. By default, it is not encrypted. Developers should therefore be cautious when using the API.

For the Demo I'm thinking of using a user object which contains access token and PII. The data will be stored in plain text in the sandbox.