Use value of hcamcorder->sound_focus_id instead of 0 when acquiring or releasing...

Use value of hcamcorder->sound_focus_id instead of 0 when acquiring or releasing a focus for session backward compatibility

Previously, value 0 is used for the first parameter(id) of mm_sound_acquire_focus()/mm_sound_release_focus().
As a result, it caused misbehavior of session backward compatibility. Now it is fixed corretly.

[Version] 0.10.82
[Profile] Common
[Issue Type] Bug fix
[Dependency module] N/A
[Dependency commit] N/A
[Test] [M(T) - Boot=(OK), sdb=(OK), Home=(OK), Touch=(OK), Version=tizen-mobile_20161016.2]

Change-Id: I0db7fdeb122764f377a835c505f776568d01b557
Signed-off-by: Sangchul Lee <sc11.lee@samsung.com>