Merge "[Media TTT] Add more information about code architecture to the...

Merge "[Media TTT] Add more information about code architecture to the tap-to-transfer README." into tm-dev am: f7430fce am: 58473b21 am: 4a603362 am: ec3b4c93

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18231441



Change-Id: Id31dc9b86dcdfd808035eac77e54f8e65c039c30
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>