Merge "Add demo code for testing" into main am: 4db54e9935 am: b8024771a9

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

Change-Id: I0705954322ec2d1ed2cab3816896517a5fa5bd86
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>