Allow listener garbage collection

Currently listeners that expire (either because of expireAt or
numUpdates) will never be removed from the client listener list. Fix
this by adding a new ILocationListener callback.

Also remove old status callback that isn't being used anymore.

Test: atest CtsLocationFineTestCases
Change-Id: I3f8a5058988c8257f25fe63a0c62e9d26ed2cf00