Dependency model should include classifier, and this must be printed in the advice

**Plugin version**
0.68.0

**Gradle version**
6.7

**Android Gradle Plugin (AGP) version**
4.1.1

**Describe the bug**
Added a dependency of `implementation "net.danlew:android.joda:2.10.7.2"` and then running this plugin:

```
Transitively used dependencies that should be declared directly as indicated:
- implementation("joda-time:joda-time:2.10.7")
```

After adding it, my project doesn't build due to this issue:

```
Duplicate class org.joda.time.Chronology found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
Duplicate class org.joda.time.DateMidnight found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
Duplicate class org.joda.time.DateMidnight$Property found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
Duplicate class org.joda.time.DateTime found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
Duplicate class org.joda.time.DateTime$Property found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
Duplicate class org.joda.time.DateTimeComparator found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
Duplicate class org.joda.time.DateTimeConstants found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
Duplicate class org.joda.time.DateTimeField found in modules jetified-joda-time-2.10-no-tzdb.7-no-tzdb (joda-time:joda-time:2.10.7) and jetified-joda-time-2.10.7 (joda-time:joda-time:2.10.7)
```

Not sure if this is really an issue, but I didn't know what was going on so I filed, just to be sure as it could help someone else out in the future

Reproduce the report with plugin 0.68.0, Gradle 6.7, and AGP 4.1.1 using the android.joda dependency shown, then trace how dependency data becomes the printed advice. Confirm that the classifier is retained in the dependency model and appears in the advice, with coverage for the reported no-tzdb case.

Written by the indexing model from the issue text.