Feature Request: Allow for adding comments to AndroidJUnitRunner flat test file execution option

Currently, we (Mozilla) have large `androidTest` (Espresso) test suites with a lot of annotated disabled tests for `@Ignore` (using `org.junit.Ignore`). The default `@Ignore` JUnit Annotation allows for a default parameter of which we make use for linking back to issue trackers (e.g, `@Ignore("Blocked on X")`

I've been looking at the AndroidJUnitRunner documentation for exploring alternative ways to handle manifests (e.g, maintaining a remote list of disabled tests that can be updated in one spot), alongside the execution option `notTestFile` for listing tests we want disabled without having to annotate.

One aspect missing from a flat test manifest file is the ability to give context to the listing such as adding a comment. Wondering if this can be considered for the future for AndroidJUnitRunner (I'm all ears on other ideas too).

Example: `disabled-tests.txt`

```Text
org.mozilla.fenix.ui.SettingsTests # Rewrite needed to support Compose UI
```

Review the AndroidJUnitRunner documentation and the notTestFile execution option first. Use the disabled-tests.txt example as the acceptance case: entries should support trailing comments such as "# Rewrite needed to support Compose UI" while preserving test selection behavior.

Written by the indexing model from the issue text.