Deprecate SIP service support.

Change SipAccountRegistry to no longer create any SIP accounts and start
Sip services.
If there's any SIP account exisiting, stop it and delete the profile in
the database. Then send the user a notification about this and let user
to make sure 'Make call with...' option set to proper accounts.
Change PhoneAccountSettingsFragment to show 'Make call with...' option
all the time.
Remove SipPhoneAccountSettingsActivity.

Bug: 164164923
Test: Manually test with a device default to make call with SIP
accounts.

Change-Id: Ia0624e00f6854f6105284bf0917efc21943520e2
6 files changed