[Sb refactor] Add a demo command flow method am: 2775b3b39e am: 880c361bb6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20769735

Change-Id: Idf02994e5444dbaf37398d1ac73ddc4f7e6c0f3a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>