Fix to unregister the mSmsBroadcastReceiver from CatService when the

process is disposed.

During some stress test this would cause issues as the maximum number of broadcast
receivers per process is 1000, casuing anything after that to not be
registered.

Bug: 338936403
Test: manual test removing/inserting psim and disable/enable esim

Change-Id: Iecf801ba4c9c9b463ff072f436d00dc967d90e80