Bolts-Android | level libraries designed to make developing mobile apps | iOS library

I ended up solving this by writing a utility that traverses the contents of the .apk directory, finding .jar and .aar files, and unzipping them into subdirectories. This could be done manually, without a script, as well. You see references to these files in the log lines containing Mimetime_gradle2.apk/Star Horse/ in this project.

After unzipping all of these, it was simply a matter of searching the parent directory recursively for references to the library called out in the output of the gradle command using --stacktrace. In this case it was com.google.auto.value.extension.memoized.Memoized

Then it was simply a matter of removing one of the libraries that contained it from the Unity project. In this case it was an outdated copy of another library which was included with ExternalDependencyManager.

The difficulty is that you need to export a gradle project from the Unity build menu, rather than build the APK directly. Then you need to copy the command for the specific version of gradle that your specific version of Unity uses, and run it with the --stacktrace option in order to get the output you need to identify the duplicate package. THEN you can unzip the resultant build directory (which takes the place of the APK file) and search it for the offending package.