Add SynchronizationService

This service will replace OperationManagerService in next modification.
It is a bound and started Service which will run undefinitively
- Add new services.SynchronizationService
- Update EdriveApplication.java to start SynchronizationService when device reboot (if all condition are met)
- Update services.ResetService.java to stop SynchronizationService when account is removed
- Update AndroidManifest.xml to replace OperationManagerService by SynchronizationService
- Update InitializerService to start SynchronizationService when its jobs is over