Fix paused data handling logic

Fix paused data handling logic

- Issue:
If sound_data queue is cleared still player thread has reference of the first element of the
sound_data queue, then player thread makes double free problem of sound_data.

- Solution:
Problem is because the player thread tries to destroy the data without ownership of the data. So
This patch makes the player thread has ownership of played sound_data. By this change, player
thread can destroy the data that the thread has its ownership.

Change-Id: Ib3e34f9cc8632458f097edd760da2179471bc864
Signed-off-by: Suyeon Hwang <stom.hwang@samsung.com>