Google has announced the first Android 14 beta, which provides support for over 300 OpenJDK 17 classes. Additionally, it implements a number of features aimed to keep malicious apps at bay and extends support for foldable form factors, battery usage optimization, and more.
While Android 14 aims to bring OpenJDK 17 to Android developers in its entirety, the first beta, though, only offers support for 300 classes. Google has provided no specific detail about which OpenJDK 17 classes have been added, but you can see a list of all changes in the java package in the official API diff document.