Where to find official app marketing material for Android similar to what Apple offers for the App Store? [on hold]

I'm currently working on the final steps before publishing an app to the App Store and Google Play Store. Apple offers lots of marketing materials, like official iPhone product images, to mock up app screenshots to publish to the App Store.

Link to Apple's product images to download

I'm wondering if Google, Samsung, or any other Android phone brand, offer anything similar, like official phone mockups in .psd format or something similar.