Merge "Selects a active sim to MobileNetworkActivity w/o subscription ID input" into sc-dev am: 939136b34b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/15498710

Change-Id: I09932874d5c45b1570d0fd83a8f8b1aad4b43108