[Video player] Closing full screen icon should take user back to Dash preview
User launches the video from Dash Video scope preview, video starts playing in video player. Users closes the video by tapping on the "close" (or collapse full screen) icon. This closes the video and takes user to the next app in the running stack (eg note app if that's the next app I have opened)
When users launch the Video from Dash Video scope and closes it (by tapping on the collapse full screen icon), it should take the user back to the Preview screen where they initially launched the video.