Do not push carrier configs when they are not for an identified carrier am:...

Do not push carrier configs when they are not for an identified carrier am: 4a4d1ff9 am: f29fb059 am: 743a1b6f

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/1961641

Change-Id: I33cc0c370428e2be44267c113447770008f17040