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

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



Change-Id: Ie777f6ddd4fc09ffe956338fa0696ef912af2d66
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>