Just record initial task-order, don't collect the task

Since we are recording the order but don't yet know if the
task is expected to change. If we collect it without changing
it, it could end up waiting for a non-collected child to
report.

Bug: 276608270
Test: atest IncompleteMotionTest
Change-Id: I7ebf72e21c0844e42db8bb4944b62b0e31e062c4