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
Merged-In: I6ecb9628ae2d8f2efe4f2c2d51db7d5b04d0317e
Change-Id: I6ecb9628ae2d8f2efe4f2c2d51db7d5b04d0317e
2 files changed