Fixed that call forwarding icon not shown issue

Fixed that call forwarding icon not shown when enabling
all call forwarding (i.e. unconditional + all conditional) when
using UT interface. Used the same logic from circuit switch SS.

Test: manual
bug: 69427654
Merged-In: I5e43f006bfb4752ca1119e3e226746923a10f4a3
Change-Id: I5e43f006bfb4752ca1119e3e226746923a10f4a3
(cherry picked from commit aea49bb0)