[MSHARED-1410] Track used declared dependency usage by referencing classes

[jaredstehler]

As a follow-on to https://issues.apache.org/jira/browse/MSHARED-1407

This will also map uses of used declared dependencies to their referencing classes.

We use this in our internal dependency analyzer to support validation for migrating classes to new packages - for classes in a migration, we select their new artifact as a used dependency and not their old one.

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[jaredstehler]

gentle bump; anything I can do to help get this integrated?

[slawekjaranowski]

@jaredstehler - thanks for patience