[Sb refactor] Add a demo command flow method am: 2775b3b3

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



Change-Id: I6a2363b871663f446f38dc5918f10e6a1348c31c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>