Checking disabled state handling of fullscreen button

Checking disabled state handling of fullscreen button

[Title] Checking disabled state handling of fullscreen button
[Issue] N/A
[Problem] After failing to seek on slider, the fullscreen button is disabled.
[Cause] when a seek error occurs, do not consider the fullscreen mode.
[Solution] Add the code checking disabled state handling of fullscreen button

Change-Id: I74ab6a7bdbd82dd6f95c166408c24a8cf0a1e873