sde: Add hooks for dump information.

1. Implement dump interface and provide hooks for adding
   dump information from different modules.
2. Rename writeback session module to offline controller.
3. Merge logger.h functionality into debug.h
4. Rename DISPLAY_* as SDE_*.

Change-Id: I3e8df27a848475d067801037bcdc807561d35cc8
27 files changed