This updates most of the configuration for Android while keeping with libGDX 1.9.11 by default. You should double-check any settings in the Advanced tab if you target Android! Any older settings will be kept in preferences until you change them, so unless you're using Liftoff for the first time, you should check the settings for Android targets. Target SDK should be 29, and must be at least 29 to deploy an app to the Play Store. The Android Gradle Plugin should probably be 4.0.0 (or newer); 4.0.0 has some breaking changes and Liftoff tries to be compatible with 4.0.0. The Android build tools version is now determined by the Android Gradle plugin and cannot be configured.
I'm not 100% sure this release will work out-of-the-box to deploy to app stores other than Play Store, or even to the Play Store a week from now... It seems to produce working debug APKs, and I've at least been able to test those on an Android 10 device. Thankfully, Liftoff just creates the Gradle configuration, and that can be changed when circumstances do.