drm_hwcomposer: Add support for color encoding and range properties

Starting from the linux-v4.17, the DRM module has support for different
non-RGB color encodings that are controlled through plane-specific
COLOR_ENCODING and COLOR_RANGE properties.

This patch creates a matching between the HWC layer dataspace which is
supported by DRM driver and DRM plane properties.

Signed-off-by: Matvii Zorin <matvii.zorin@globallogic.com>
diff --git a/include/drmhwcomposer.h b/include/drmhwcomposer.h
index 0706ae5..1007144 100644
--- a/include/drmhwcomposer.h
+++ b/include/drmhwcomposer.h
@@ -136,6 +136,7 @@
   uint16_t alpha = 0xffff;
   hwc_frect_t source_crop;
   hwc_rect_t display_frame;
+  android_dataspace_t dataspace;
 
   UniqueFd acquire_fence;
   OutputFd release_fence;