pepper: view damage processing and repaint scheduling

pepper: view damage processing and repaint scheduling

1. Schedule repaint on all outputs when a view is modified.

2. Each output update views in the compositor's view list.
   Updating the views will inflict damage on their belonging plane.

3. Each output gathers views visible on it.

4. Assign planes for the visible views.

5. Do repaint.

Change-Id: Ie3e05107a6b31908866eb90e4d4b3d37d5872fe8