Call RequestUpdateOnce in OnWindowShown()
Call RequestUpdateOnce in OnWindowShown()

Rendering should be done when a window is shown.
But the Adaptor may be in the running state (when other windows are shown). So call RequestUpdateOnce() in that case.

Change-Id: I5c3725fd171c0d93fdfbf00362e239fb66716fb6

dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor