1. Removed setting from Settings.System class. 2. Added settings database migration step to change "SIP_ASK_ME_EACH_TIME" to "SIP_ADDRESS_ONLY" as the "ask me each time" option no longer makes sense given the new phone accounts settings. Bug: 17321422 Change-Id: I3df1be4fcda44f2097c49af44508ac1fce72a24b