Delete timer handle for service state changed notification

Delete timer handle for service state changed notification

- Issue:
The timer handle for service state changed notification is not deleted
if ttsd_finalize() is invoked before that the timer is handled.

- Solution:
This patch makes ttsd_finalize() delete the timer handle. And also, the
memory which stores the state change information should be deleted with
deleting the timer, because the memory is allocated for this timer
behavior.

Change-Id: I7a429c8ab5fb89237ba38c2b1c44c9d606ef01dd
Signed-off-by: Suyeon Hwang <stom.hwang@samsung.com>