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/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 01ffac2..fdc3650 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -632,6 +632,7 @@
         info.ydpi = ydpi;
         info.fps = float(1e9 / hwConfig.refresh);
         info.appVsyncOffset = VSYNC_EVENT_PHASE_OFFSET_NS;
+        info.colorTransform = hwConfig.colorTransform;
 
         // This is how far in advance a buffer must be queued for
         // presentation at a given time.  If you want a buffer to appear