Merge "Add demo code for testing" into main am: 4db54e9935 am: b8024771a9 am: 010f8cf43c am: 75323cbe16

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

Change-Id: I0dde5708fd73d1b0e8452de2e7c8383119776def
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>