Add supported URI scheme to PhoneAccounts. (3/4)

1. Modify TelephonyConnectionService to register voidemail URI scheme.
2. Modify SipConnectionService to register 'tel' URI scheme in addition
to 'sip', should the user have chosen to use sip for all calls.
3. Modify SipBroadcastReceiver to listen to ACTION_SIP_CALL_OPTION_CHANGED
intent, triggering a rebuild of the SIP PhoneAccounts.
4. Fixed bug where all incoming SIP calls show as Unknown number.

Bug: 17140110
Bug: 17326799
Change-Id: I11d25c2cd98d02b80919d95ae9af077edb179fe0
6 files changed