Finish impl of job queue: handle URI permissions.

The job queue now handles URI permissions associated with
the Intent of each job.  Just (kind-of) like Service!

Also do the second pass of locking in job scheduler, getting
rid of all the async dispatching on a handler, and just executing
calls right in line with simple locking.  This probably fixes
a few other race issues, and allows us to make sure that we
always finish a job correctly when dequeuing the last work (we
will always atomically dequeue and finish, so no new work can
slip in between).

And fix a little debug output in IntentFilter.

Test: ran CtsJobSchedulerTestCases, added new test for URI perms.

Change-Id: I52f700ef0cd5be3ff70050f9c0f5fe3e8a5ccac1