hwcomposer: Add HWC_EVENT_ORIENTATION to hwc

Change-Id: If15b475173600d2467d7fbdd43b428b4bdd94d8a
CRs-fixed: 382796
hwcomposer: Add HWC_BLIT compositiontype value

- HWC_BLIT this layer will be handled in the HWC, using a blit engine
- setting this will inform Surfaceflinger to flip FB_TARGET

Change-Id: I25d19ec41b57863d451c3e390109c912faf1381c