Add system_api_service to qtelephony

1) atfwd-deamon need access to system api for resetting target
   using AT+CMAR command. Add system_api_service permission to
   qtelephony
2) move qtelephony.te file to private directory
3) remove ctl_default_prop from qtelephony.te file

Change-Id: I00febd3be3c66279c544e61a1ab01b58c1003107
CRs-Fixed: 2075086
4 files changed