https://www.theverge.com/2018/11/7/18071720/google-android-foldables-fragmentation-displays
Google is officially announcing support for a category of Android devices it's decided to call "Foldables." Speaking today at the Android Developer Summit, VP of engineering Dave Burke said that Google is "enhancing Android to take advantage of this new form factor with as little work as necessary."
Samsung demonstrated a prototype device during its developer conference today, and dimmed the lights to protect elements of the design. Nevertheless, Samsung showed a device that folded out into a tablet and back up into a candybar-like form factor. The device includes a cover display that acts as a phone, and a main 7.3-inch tablet display.
Google is also officially supporting these new foldable devices with Android, and it's working closely with Samsung for the launch of this phone next year. Google is providing guidance for developers to start using existing features that are built into Android to support these foldable displays.