remove ad (reverted from commit 681b9cf5e6dbb37eacdfbcb72815e919f00f6758)
Revert "remove ad"

This reverts commit 681b9cf5e6dbb37eacdfbcb72815e919f00f6758.
update background service

Period =  2hours
Auto start service after reboot
Fix notification
Fix  conflict between Service and Activity

- Service will not running if Activity is running
- Service will update each 3 hours
- Optimize code to run faster
- Still has conflict (small oppturnities)