telephony: Fix initialization ordering of SMS middleware

* For an unknown reason the IccSmsInterfaceManager reference first
  passed to the proxy is null, re-register that reference after the
  reference has been initialized.

Change-Id: I4028fc311b2c54b8022d036c23938a5701e0390d
DcTrackerBase: Dont provision APN if default is disconnecting

Change-Id: I99344d89235b24689cde14335bf593099169ef0d