IPtProxy is missing in onionmasq-main-debug.aar

For some reason IPtProxy's native libaries (libgojni.so) don't get added to the aar even though IPtProxy is listed as a dependency in the library module's build.gradle.

This issue has been covered by the fact that the sample app successfully includes IPtProxy while building ArtiToyVpn. I think the reason is that ArtiToyVPN uses the onionmasq library module as a local module dependency instead of a library dependency, which would be fetched from our container registry.

We need to figure out how we can ensure that IPtProxies native part also gets added to the onionmasq aar, which is pushed to our container registry.