SF: Add colorTransform to DisplayInfo

Adds the colorTransform field, which defines a vendor-specific color
transform (e.g., wide gamut, sRGB, etc.) to the DisplayInfo class, and
populates it from the HWC interface.

Bug: 20853317
Change-Id: I153edc36a361407656f3eb5082b96c2da2ecbec7
diff --git a/include/ui/DisplayInfo.h b/include/ui/DisplayInfo.h
index 799944f..ad73ee7 100644
--- a/include/ui/DisplayInfo.h
+++ b/include/ui/DisplayInfo.h
@@ -36,6 +36,7 @@
     bool secure;
     nsecs_t appVsyncOffset;
     nsecs_t presentationDeadline;
+    int colorTransform;
 };
 
 /* Display orientations as defined in Surface.java and ISurfaceComposer.h. */