Implement ObserverService binding to SynchronizationService

- Update SynchronizationService.enqueueOperations() parameters: List<ComparableOperations> is now Collections<ComparableOperation>
- Implement Binding component into ObserverService
- Replace intent for OperationManagerService by binding usage to pass list of operations to perform into SynchronizationService
- Fixed coding style: add spaces around if/else statement in InitializerService