Merge "Avoid to set displayname to null in euicc sub info." into udc-dev am: bf9add85

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/22730451



Change-Id: I751d51f9132715ec7397b52e52eaa4737a93e956
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>