[player_stop] Set visible to FALSE before doing seek to 0

[player_stop] Set visible to FALSE before doing seek to 0

[Problem] Screen blinks when the Video has finished playing
[Cause & Measure] Cause : When player_stop is getting called, first screen is always showing.
Because visible value is changed after doing seek 0.
Measure : Set visible to FALSE before doing seek to 0.
[Checking Method] message / select Video message / select Video file / check the screen when the Video has finished playing
[Team] MM FRAMEWORK
[Developer] JaeChan Lee
[Solution company] Samsung
[Change Type] Specification change

Change-Id: I3aa886b863c7d3e6d81f6ce37d9f86086bc87c87