Merge "Updated the document regarding T data stack" into tm-dev am: fa4a7135 am: 792fa5f8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18439685



Change-Id: I44d5450384b34dbf433d15a4812308f9b0d5365f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>