Vulkan:Fix missing coherent memory data problem for MEC (#262)
Vulkan:Fix missing coherent memory data problem for MEC (#262)

For recreated buffers and images that are backed with mapped coherent
memory, we need to read the whole buffer/image memory to get the initial
data of them.
pmuetschard/gapid,baldwinn860/gapid,ben-clayton/gapid,dsrbecky/gapid,google/gapid,baldwinn860/gapid,baldwinn860/gapid,eternity74/gapid,eternity74/gapid,Qining/gapid,google/gapid,ek9852/gapid,ben-clayton/gapid,google/agi,ek9852/gapid,dsrbecky/gapid,google/agi,dsrbecky/gapid,dsrbecky/gapid,ek9852/gapid,ben-clayton/gapid,ek9852/gapid,eternity74/gapid,eternity74/gapid,eternity74/gapid,pmuetschard/gapid,ben-clayton/gapid,Qining/gapid,ek9852/gapid,dsrbecky/gapid,google/gapid,google/gapid,eternity74/gapid,google/gapid,pmuetschard/gapid,pmuetschard/gapid,Qining/gapid,pmuetschard/gapid,google/agi,Qining/gapid,pmuetschard/gapid,ek9852/gapid,baldwinn860/gapid,google/agi,pmuetschard/gapid,ben-clayton/gapid,dsrbecky/gapid,google/gapid,google/agi,ek9852/gapid,baldwinn860/gapid,dsrbecky/gapid,eternity74/gapid,google/agi,google/gapid,ben-clayton/gapid,google/agi,google/gapid,Qining/gapid,Qining/gapid,pmuetschard/gapid,Qining/gapid,ek9852/gapid,google/agi,dsrbecky/gapid,ben-clayton/gapid,baldwinn860/gapid,ben-clayton/gapid,baldwinn860/gapid,Qining/gapid,baldwinn860/gapid