1) Implement background sms forwarding.
2) Renamed ForwarderObserver to ForwarderManager.
3) Renamed KeyValueSettgins.dart to key_value_settings.dart.
4) Abandoned sms_maintained in favor of telephony because the latter
supports background execution.
1) Implement background sms forwarding. 2) Renamed ForwarderObserver to ForwarderManager. 3) Renamed KeyValueSettgins.dart to key_value_settings.dart. 4) Abandoned sms_maintained in favor of telephony because the latter supports background execution.
Closes #5