Update notes for submitted changes

* libhwcomposer: Don't reset cached layer handle on MDP comp
* hwc: Reset previous width and height
* hwc: Correct Display Commit sequence during WFD-HDMI interaction.
* hwc: hwc_sync - populate correct fences for BLIT
* hwc: Do not use C2D composition for plane alpha
* hwc: send layer with non-contiguous buffers to GPU
* hwc: Use rotator for resolution change for all display