IMS: Add data check for UT supplementary service of CallForwarding

UT supplementary service of CallForwarding need to make sure that
mobile data and data roaming is available. Need to show a dialog to prompt
user if mobile data is not available or DDS is not on current activate sub.

Issue: FP3-A13#56
CRs-Fixed: 2172727
Change-Id: I92c004c5b9c970ec7b3fd0c270de60c729aad6d1
(cherry picked from commit ebd22eda466d7c907016f5055d46fb1ec3792fc0)
2 files changed