[automerger skipped] Fixed NPE when local or remote port range does not exist am: e8db41ba -s ours

am skip reason: Merged-In Ic6bdeac05fedd02045d094fe2d1cbbaa7413208a with SHA-1 db7565b9 is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/2032670

Change-Id: I8b4741add4b425602d98a5927cf0a3cdf7a4934d