It took a little while but I found what I was looking for. It just happened to be the way I was wording my searches.
This lesser-seen answer was exactly what I was looking for:
Transitive dependencies not resolved for aar library using gradle
Note that dependencies are only associated with aar libraries if they are hosted in a maven repository, in the first place, as the pom file is not included in the aar.
Essentially, I needed to add a
transitive = true
…to the build.gradle of Bar
Example:
compile ('com.foo:FOO:1.0.0@aar'){
transitive=true
}
This way it includes all of my transitive libraries.
Note, however, that this may actually cause conflicts between dependencies (especially local ones) which can be resolved using an exclude tag.