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
This change
1) implements MDP Composition upto 3 layers
2) adds invalidator support to fall back to FB
composition during idle screen condition.
Change-Id: I8d724f905c943f986b68596e2548a7f5a8ce6588
