surfaceflinger: compute color mode mappings on hotplug

Populuate DisplayDevice::mColorModes when a DisplayDevice is
created.

DisplayDevice::mColorModes is a map from any possible
Dataspace/RenderIntent to supported
Dataspace/ColorMode/RenderIntent.  This makes sure we never ask the
composer to use an unsupported Dataspace/ColorMode/RenderIntent
combination.

The map is populated on hotplug because we don't want to compute the
mapping on the fly at each frame.

Bug: 79843697
Bug: 75981986
Test: manual under sRGB, P3, HDR
Change-Id: I967d09b1e8d31ea631b202db1799a7a2a0c5ee3f
Merged-In: I967d09b1e8d31ea631b202db1799a7a2a0c5ee3f