Merge "Allow call forwarding number with prefixes to be dialed while on IMS roaming" am: 17c583fbce am: 759853ba37 am: 4741ad7efa

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1392940

Change-Id: I792958ab6d5ced4414fc0e5efa070b498550ed2b