Add functionality to report instant sensor status change

Add functionality to report instant sensor status change

- Problem: in ABSENCE case, even the motion sensor detects ABSENCE
ua-manager reports this ABSENCE state after the detection window complete.
- Cause: If ABSENCE case, the ABSENCE can be jurged only when the
detction window complete.
- Solution: Whenever the sensor status is changed, plugin reports status
changed event immediately so that the user can recognize ABSENCE event
takes place during uncompleted ABSENCE detection window.

Change-Id: Ia5b12304976db4b89e5fa0977ea366a08361fc0e
Signed-off-by: saerome.kim <saerome.kim@samsung.com>