Hide Self-service preview tabs in Edit appearance for Android apps (#50533)

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<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** Resolves #44791

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

## Testing

- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually

## Summary

Android apps are always self-service and installed from the Play Store
in the end user's work profile — there's no Fleet self-service web view
for them. The "Edit appearance" modal's Preview section still showed a
"Fleet" / "Self-service" tab pair with a browser-style self-service
preview for Android titles, which doesn't reflect what end users
actually see (#44791).

This PR removes the tab nav for Android software titles in
`EditIconModal` — the Preview section now renders just the Fleet card,
with no tabs and no Self-service preview.

## Test plan

- [x] `yarn test` for `EditIconModal.tests.tsx` (added a test asserting
no tabs/Self-service text render for an `android_apps` source, existing
test confirms tabs still render for non-Android)
- [x] Manually verified in a local dev instance: seeded an Android
software title, opened Actions > Edit appearance, confirmed Preview
renders the Fleet card directly with no tabs

(Recreated from #50530, which accidentally included unrelated commits
from a stale branch base.)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Removed the misleading Android Self-service preview from the Edit
appearance modal.
* Android app previews now show only the Fleet preview and Version view.
* Other software continues to display both Fleet and Self-service
preview options.
* **Tests**
* Added coverage to verify the correct preview tabs and version display
for Android apps.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

changes/44791-android-edit-appearance-self-service-preview

@@ -0,0 +1 @@
+- Removed the misleading Self-service preview tab from the "Edit appearance" modal for Android apps. Android apps are installed from the Play Store rather than the Fleet self-service web view and updating its appearance will not change anything in Play Store.