Stop the actual job in question.

Comparing just the UID and job ID when determining the job to cancel
could mean we may not actually stop the correct job (in scenarios where
there are temporarily overlapping job executions). Change the
equivalency check to ensure we stop the right job.

Bug: 231148615
Test: atest CtsJobSchedulerTestCases
Change-Id: I2d873b9f9acef2b360d631cd4937572e89cabefc