gapis/atom: Fix invokeMarker type mismatch
gapis/atom: Fix invokeMarker type mismatch

These were being added as extras instead of separating read from write
observations. Impressive this hasn't been spotted or hasn't had any
side-effects.

pmuetschard/gapid,dsrbecky/gapid,dsrbecky/gapid,ek9852/gapid,dsrbecky/gapid,google/gapid,Qining/gapid,baldwinn860/gapid,pmuetschard/gapid,google/agi,dsrbecky/gapid,Qining/gapid,google/gapid,pmuetschard/gapid,google/agi,baldwinn860/gapid,google/gapid,google/agi,ek9852/gapid,baldwinn860/gapid,pmuetschard/gapid,Qining/gapid,Qining/gapid,baldwinn860/gapid,ek9852/gapid,dsrbecky/gapid,ek9852/gapid,google/agi,Qining/gapid,pmuetschard/gapid,google/agi,google/gapid,google/agi,baldwinn860/gapid,ek9852/gapid,google/agi,google/agi,google/gapid,baldwinn860/gapid,Qining/gapid,ek9852/gapid,dsrbecky/gapid,baldwinn860/gapid,google/gapid,pmuetschard/gapid,ek9852/gapid,Qining/gapid,baldwinn860/gapid,ek9852/gapid,google/gapid,google/gapid,dsrbecky/gapid,Qining/gapid,dsrbecky/gapid,pmuetschard/gapid,pmuetschard/gapid