[Smart Forwarding] Enable configuration UI in call setting

Enables configuration UI entry in call setting

Bug: b/127693686
Test: Add fake code locally, and see if
  (1) UI entry appears only when primary SIM support this feature
  (2) Get into UI when click from call UI setting
  (3) Enable/disable setting of feature

Change-Id: I30a1a1db1c74601eed5b27bfbeaeb47949a5a83f
1 file changed