Merge "Updated the document regarding T data stack" into tm-dev am: 5a1a044e am: 0eeed37e

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



Change-Id: I66e709ba99e641f1d29f5d0ca62da897e79af515
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>