listenForPhoneState only after SLC

Start phone state listener after SLC setup, instead of on
Disconnected SM exit(). On BT OFF, quitNow() forces a SM exit()
which incorrectly started the phone state listener. Additionally
no indicator updates should be sent prior to SLC setup
bug 6976119

Change-Id: Icff2bc52602230b098651225bec92d532f3a3ff9