Merge "Block normal outgoing call when there's an ongoing emergency call." into sc-dev am: c5411e1a0b am: 680d92eb93

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/14484356

Change-Id: If241952a6f8b17c87fe3104ade96f826c3252bd6