Merge "Skip RAT type listener registration if IMSI is not available" into rvc-d1-dev am: 5403c7646a am: 5720a7b228

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12406769

Change-Id: I8e6777e87c50699977316d88478f230fce494c42