Public API for maven dependencies (currently only available on MavenPublicationInternal)

[dsaff]

Expected Behavior

Would like to be able to have access to methods like getApiDependencies, getRuntimeDependencies, etc, using a public API. Either new methods added to MavenPublication, or a new public subtype of MavenPublication

Current Behavior

These methods are only available by downcasting to MavenPublicationInternal.

Context

AndroidX tracks dependencies of all of our sublibraries in order to determine when a releasing library requires one of its dependencies to also be released in order to continue working. If we could get this information by crawling the maven dependencies through a public API at the time the publications are configured, that would be cleaner than alternatives (including downcasting to internal API or parsing the output files)