Android SDK

The website currently states the Java SDK is currently not available due to the Java 8 dependency.
This now no longer seems to be true due to the Java 8 desugaring support

The current SDK seems to work correctly with Android though (using SDK 26+)

References:
https://developer.android.com/studio/write/java8-support
https://docs.commercetools.com/sdk/jvm-sdk#about-the-java-sdk

It might be helpful to add some integration docs though for Android defining the ProGuard / R8 rules required to run the project plus the minimum required Android version (and other helpful info?).

Having a dedicated Android SDK as some point in the future like Swift / iOS has would be even better as that could take care of stuff like storing the access token(s) on device for a persistent sessions or handing of anonymous sessions which now seems to be something that has to be configured manually.