The samples that used to reside in this directory have been removed. The behaviors demonstrated here (publication and consumption of AARs with native APIs) are now used throughout the samples for code sharing, and were Android Gradle Plugin features rather than NDK features.
For an example of how to create an AAR that exposes a native library, see the
base module, or any other with buildFeatures { prefabPublishing = true }.
For examples of how to consume native APIs from an AAR, see any of the other
samples which set buildFeatures { prefab = true }.
See https://developer.android.com/build/native-dependencies for the Android Gradle Plugin's documentation of these features.