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

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



Change-Id: I8ec0f3d28d72cefba58ae527d34c8c3cc3d8e263
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>