sdm: Update PartialUpdate Interface

- Adds Start and Stop methods to PU Intf.
- Add Constraints to PU which contains enable/disable or
  cursor usage flags
- The constraints are needed which handling generating ROI
  in presense of cursor layer.
- Fixes the issue where the cursor layer failed the HW
  capability check but it was still used in generating the
  ROI for cursor partial update.

Change-Id: I00dceb4d05e3a986cd1ea15314db88ba9c62f8ac
Crs-fixed: 1073016
5 files changed