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
4 files changed