API review cleanups.

1) Make all exposed APIs SystemApi, instead of public APIs.
2) Indicate SipException when errors happen.
3) Change API name from getListOfProfiles to getProfiles

Test: make, atest TeleServiceTests:PhoneGlobalsTest
Bug: 148604927
Change-Id: Idae8353cb27ba8cc461f68e66c5f7fe14ecc9354