updated widevine logic to add and remove widevine flashvar according to plugin enable/disable
updated widevine logic to add and remove widevine flashvar according to plugin enable/disable

DBezemer/player-studio,kaltura/player-studio,kaltura/player-studio,DBezemer/player-studio,DBezemer/player-studio,kaltura/player-studio,DBezemer/player-studio,kaltura/player-studio