sf: Reset dataspace for FBT layer during color mode change

Dataspace on the FBT will change as per the colormode. Track the
color mode change and mark the dataspace of FBT layer as UNKNOWN
so that it will reset the cache and the correct dataspace will
be set using the SetClientTarget API.

CRs-Fixed: 3032271
Change-Id: I6db0cbe027b47b07fa73ba14e022288f9dee59c8
2 files changed