Make telecom a non-persistent process.

There are still activities that run in short-lived telecom processes
because the system process doesn't run activities.  By having
persistent=true, these short-lived processes ended up living forever.
For the components that run in the system process, things should remain
unchanged since the system process is already persistent.

Bug: 18112269
Change-Id: I0cc59119dc421e1d3dd4c63440487bdd7ce99b9d