Merge "Add a folder for Aconfig demo" am: 92b2b32900

Original change: https://android-review.googlesource.com/c/platform/development/+/2628494

Change-Id: If9c2543a972f463e3327c0f3eeae0fa379f6a82e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>