Block call forwarding calls with custom prefixes while roaming

We will now block custom call forward configuration calls that have prefixes
defined in the carrier config while the device is roaming. The call will
not be placed and instead, a UI error message will be displayed to the user.

Test: Manual
Bug: 30458052
Change-Id: I6ecb9628ae2d8f2efe4f2c2d51db7d5b04d0317e
2 files changed