integrate Java swagger codegen

Since gomobile has some shortcomings when it comes to sending slices or maps via the FFI, we need to find alternative ways to send menshen response model classes via the FFI. Therefore we should fetch the swagger definition from the menshen repo and create a build script that generates java model classes (instead of trying to provide java bindings for the swagger generated go model classes in bitmask-core).

This issue is part of #9185 (closed)