BHV-17199: VideoPlayer : playback controls & slider popup display issue

Issue: when spot is moved away from video transport slider, playback
controls are not shown and slider-popup position is not updated.
Cause: when spotlight model gets changed to 5-way mode we're not
handling.
Fix: showing playback controls and setting the previewMode to its
default value when spotlightModel changes to 5-way.
DCO-1.1-Signed-off-by: Srinivas V srinivas.v@lge.com