Merge "Skip RAT type listener registration if IMSI is not available" into rvc-d1-dev am: 5403c7646a am: d74c016c09

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

Change-Id: I0c3658f86f2d359778f63d3dfe4e682708ddbb71