Merge "Add demo code for testing" into main am: 4db54e9935

Original change: https://android-review.googlesource.com/c/platform/development/+/2712013

Change-Id: Id54918b6efe17c11663562ffd2dd515935e1392d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>