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
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 4df6a52..46eaaaf 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -644,6 +644,13 @@
     <string name="limited_sim_function_with_phone_num_notification_message"><xliff:g id="carrier_name">%1$s</xliff:g> calls and data services may be blocked while using <xliff:g id="phone_number">%2$s</xliff:g>.</string>
     <!-- Notification message for limited sim function during dual sim [CHAR LIMIT=80]-->
     <string name="limited_sim_function_notification_message"><xliff:g id="carrier_name">%1$s</xliff:g> calls and data services may be blocked while using another SIM.</string>
+    <!-- Notification title for SIP accounts removed -->
+    <string name="sip_accounts_removed_notification_title">Deprecated SIP accounts found and removed</string>
+    <!-- Notification message for SIP accoutns removed -->
+    <string name="sip_accounts_removed_notification_message">
+        SIP calling is no longer supported by Android platform.\nYour existing SIP accounts <xliff:g id="removed_sip_accounts">%s</xliff:g> have been removed.\nPlease confirm your default calling account setting.
+    </string>
+    <string name="sip_accounts_removed_notification_action">Go to settings</string>
     <!-- Mobile network settings screen, data usage setting check box name -->
     <string name="data_usage_title">App data usage</string>
     <!-- Summary about how much data has been used in a date range [CHAR LIMIT=100] -->
@@ -2180,4 +2187,7 @@
     <!-- name of the notification that pops up during
     a phone call when there is bad call quality -->
     <string name="call_quality_notification_name">Call Quality Notification</string>
+    <!-- Telephony notification channel name for a channel containing SIP accounts removed
+     notificatios -->
+    <string name="notification_channel_sip_account">Deprecated SIP accounts</string>
 </resources>