To this day, when doing Material design based stuff you are left to your own devices, because Google UI/UX team announced it to the world, and then left to each single developer out there to customize their Android widgets to achieve their design documents.

There are a couple of Google IO sessions where the presenter goes through how to custom write Android views to match Material.

Then a couple of years of comunity complaints they released a Material custom theme for Android that still doesn't implement 1:1 their UI/UX specification.

When this framework was finally catching up with Material documentation, they release Material You.