Merge "Update rat_at_end at the end of a voice call." into tm-qpr-dev am: a670e694

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/19470515



Change-Id: I99002ab46f34a735630fd75696f2c13a60b4580b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>