Fix CTS TelephonyManagerTest:Listen

This error is due to the race condition of the CTS test. The CellLocationChange
should be triggered in the same thread which register/unregister the listen
event. Otherwise, the result depends on the thread switch sequence.

Bug: 17790471
Change-Id: I482e3680e0f9018a4e1f493c63be2b2532f0454d
1 file changed