I privilege ics-openvpn translation to ours. If we need to change
something, we can introduce a new xml element without any future
compatibility problem with ics-openvpn.

This return to "app" instead of "bitmask_android" is due to this reading: https://developer.android.com/sdk/installing/studio-build.html#projectStructure
I'll have to tweak the final apk name in build.gradle.

This way, gradle commands generate apks correctly named.