Phone: Display Supplementary Service Notifications

As per spec 27.007 - 7.17, Supplementary services notification
should be displayed to the user.
CallNotifier registers for SVC notifications and the message
is displayed in the form of Toast to the user with the appropriate
text depending on the type of notification.

Change-Id: I06762f3ba56937ea0c5b25bc92feaebdda7ed668
Phone: Display proper message in Call Barring case.

When Call Barring is enabled on MT side, proper
message should be displayed to the user on MO
side.
As part of this change following will be displayed-
-Toast message "Incoming call is barred"
-Pop-up dialog "Party has barred all incoming calls"

Change-Id: I3bec118749acd867bfcf9cbda3be2848f3ca5530