Merge "Updated the document regarding T data stack" into tm-dev am: 5a1a044e am: 3e6c7a26

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/18436120



Change-Id: I5fb50304c1058000e01b3b5580a9a87265a83281
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>