Update notes for submitted changes

* hwc: Do not punt secure layers for non integral crops
* overlay: Account for transform in size calculation
* libhwcomposer: Make Rect utils generic.
* libexternal: remove mEDIDs string
* libhwcomposer: Optimize layer crops when possible.
* hwc: support 8x26 variants
* hwcomposer: Clear mVirtualonExtActive on EXTERNAL_OFFLINE
* display: Add support to HAL_PIXEL_FORMAT_NV21_ZSL format
* gralloc: Add padding byte for YUV 420
* get rid of HAL pixelformats 5551 and 4444
* hwc: Punt layers with non integral source crop
* hwc: Bump up version to 1.3