Track messages sent when service is inactive

[midhunhk]

Consider messages sent when background service is not running.

There are many instances reported where the message counter is not accurate and missing to count several messages. This could be caused due to android or some task manager app killing the background service.

[midhunhk]

Development in progress on the 🦄 branch

[midhunhk]

Completed experimental feature to count and track messages that were sent when the background service was killed.

[midhunhk]

Added as an experimental feature that can be enabled or disabled from preferenes. The change seems to be working from preliminary tests.