Merge "Set up demo mode repository for mobile icons" into tm-qpr-dev am: a2c6879a am: f7e551d8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20612834



Change-Id: I46a27e58de2e1add77201c996d491f36d0451f3f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>