SurfaceFlinger re-creates HWC worklist only for new frame and on
layer geometry change. Invalidate triggered by idle timeout
refreshes the existing worklist retaining its previous
composition type. So its MDP comp's responsibility to clear
layer composition types to HWC_FRAMEBUFFER on timeout.
Change-Id: Ibf11dd6c12c647c75d36d8cbad408c3ea70588bd