Fix missed refactor of serial

Bug: 109822806
Test: run vts
Change-Id: If88384699dbb4c2ddd1c580d2b35be38afd0f8e8
Merged-In: If88384699dbb4c2ddd1c580d2b35be38afd0f8e8
(cherry picked from commit c0e2e2b071df5cdff10193556163e2975f0b682c)
1 file changed