https://adtmag.com/articles/2023/01/10/public-preview-of-sdk-extensions-for-android.aspx

Google announced this week the release of the first public preview its SDK Extensions, which leverage modular system components to add APIs to the public SDK for certain previously released API levels.

Modularized system components make it possible for Android 10-based devices and higher to be updated outside major API-level releases, and make new functionality backward compatible on already-released Android versions, the company says. The new SDK Extensions leverage modularized system components to add APIs to the public SDK for certain previously released API levels. The result: Android partners are able to distribute updates broadly, quickly, and seamlessly to end-user devices in a nonintrusive manner, the company says.