Ensure ICC_ERROR generates a description in the disconnect cause. am: a00601a191 am: 2f14417300

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/19271386

Change-Id: I95bccf34c20d6ff71d2344198835460f9b8c1fbd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>