Fix reboot lost setting issue, retry sms when signal comes back.

1. Bug where a reboot loses the user set "disabled" setting upon reboot.
2. Retry sending the activation sms if the visual voicemail source is
not activated.

Bug: 21978479
Bug: 21952287

Change-Id: I8394c71fe48253a439c993163cf21be73949ab3d
7 files changed