Remove cancelled job from evaluation list.

The changedJobList is used as the list of jobs we should evaluate to
either add to the pending list or stop from execution. Thankfully,
cancelled jobs are never considered eligible to run, but removing them
from the evaluation list to reduce unnecessary work.

Bug: 141645789
Bug: 228334264
Test: N/A
Change-Id: I6017afbb79a3e3871273cdc0a1faa97344cfcabf