testing: return colorfiltermaker for halo

for some reason this still can't be found when used as an import in another class (haloproperties)

Change-Id: I901c30e4135b913764008a4b80e306431ae8a938
SystemUI: repair halo's notification service

Change-Id: Idcaabca5b04a42ed1316dd554686a29a2cab6bc8