Disable "Preferred Network Type" setting in call

When we are in a call and the user tries to change
the "Preferred Network Type", the modem may throw
an error. To prevent this, disable the UI option while
in a call.

Bug: 70937729
Test: Manual - incoming call in menu, enable world mode
Change-Id: I3f872c343986a6495d379ae8439938906ba3daab
1 file changed