Persist the todo items into SQLite instead of a text file

[haishmg]

Added new changes to Persist the todo items into SQLite instead of a text file, please review. @codepathreview @codepath

[nidhi1608]

Great to see you were able to augment your app with SQLite support. As mentioned earlier, the extension tasks available on each project are often the most valuable learnings since they dive deeper into common real-world Android use cases.

Your application will be passed along to the organizers for final admissions. You should hear back again soon. Let me know if you have any questions in the meantime.

[haishmg]

Thanks nidhi1608, looking forward to attend the training