Merge "Add sample() Flow utility function" into tm-qpr-dev am: 794fb277 am: 049c894f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19860000



Change-Id: I4736741af4d6c043b8a1c08e4317404fce7b0ff1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>