Stop StkAppService when no CatService is available

StkAppService does not stop itself when phone starts with no SIM card if
it is dual SIM model. That is because the initial state of CatService
(mStkService) is STATE_UNKNOWN. The state of the service must not be
checked if CatService does not exist.

Bug: 31979523
Test: Confirmed StkAppService is correctly stopped with no SIM card.

Change-Id: I22275cedbb77fb9abd259845c73b5f14dfff5fdb
1 file changed