Fix initialization of SIM accounts.

- Moves setup out of a broadcast receiver and into TelephonyGlobals
- Reruns setup whenever the SIM state changes (hotswap support)
- When no SIM is inserted, register an emergency-only PhoneAccount.

Bug: 16491446
Bug: 16445149
Bug: 16495971

Change-Id: Icee8013c35f7439c58af7b7777af9a99798bff43
6 files changed