Make Sure wouldBeReady() Works With Flexible Job Constraints

JobStatus.wouldBeReadyWithConstraint() is used by several controllers to
try and prevent unnecessary work, by ignoring the flexibility constraint
we can ensure it continues to provide the right value.

Bug: 238919127

Test: atest frameworks/base/services/tests/mockingservicestests/src/com/android/server/job
Test: atest frameworks/base/services/tests/servicestests/src/com/android/server/job
Test: atest CtsJobSchedulerTestCases
Change-Id: I9ae1565f44ea4ab3ce2e6e3d7be8e67243be12ea