Add sample for WebView force dark mode

[sushantsikka]

No description provided.

[snippet-bot]

Here is the summary of changes.

You are about to add 1 region tag.

• misc/src/main/java/com/example/snippets/jetpackwebkit/JetpackWebkitActivity.kt:19, tag android_views_notifications_build_basic

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment

[sushantsikka]

@cartland could you please check if these file locations make sense?