Merge "DO NOT MERGE Add helper method in phone to get new carrier config key." into udc-qpr-dev am: 102b23c5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/24628058



Change-Id: I23e74d4287087d90fa5f61b1ad396e656f683b9e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>