Apply display color matrix in Skia-RenderEngine.

Also adjust docs to ensure that applying the color matrix matches
HWC expectations. Specifically, the color matrix needs to be
applied in the output color space, rather than in linear space
as the docs suggest.

Bug: 164223050
Test: adjust HWC to always allow for display color transforms, and do
color inversion

Change-Id: I866a79b87b7a0f9432c7292f9237ecc4dd2139d7