goldfish-opengl: nuke memoryTypeIndexMappingToHost, memoryTypeIndexMappingFromHost, hostMemoryProperties
Ever since a88a3107ef980 ("goldfish-opengl: nuke virtual heap"),
these properties just perform an identity guest <--> host mappings
and are no longer used.
BUG=233803018
TEST=compile
Change-Id: I6d0d77889e6f9fd4ce2e2708a649d578e4e60070