Filter out non-toc chapters

[MiSikora]

Description

This PR introduces filtering out chapters that should not be in the table of contents. See the specification for more details.

The implementation relies on splitting real index and UI index. Real index is stored and is always used for syncing pre-selected chapters. While UI index is computed on-the-fly after we filter out all invalid chapters, etc.

In the database migration I had to delete all cached remote chapters as we don't have information whether such chapters should be displayed or not.

Fixes #3480

Testing Instructions

1. Install the app from the main branch.
2. Subscribe to the No Agenda podcast.
3. Play the 1728 - "Hatchet Man" - No Agenda episode.
4. See chapters.
5. Deselect a chapter like X sats from Y.
6. Close the app.
7. Install the app from task/chaptes-toc branch.
8. Go back to the chapters from the 4th step.
9. Verify that you don't see X sats from Y chapters and no chapters got de-selected.

Checklist

• If this is a user-facing change, I have added an entry in CHANGELOG.md
• Ensure the linter passes (./gradlew spotlessApply to automatically apply formatting/linting)
• I have considered whether it makes sense to add tests for my changes
• All strings that need to be localized are in modules/services/localization/src/main/res/values/strings.xml
• Any jetpack compose components I added or changed are covered by compose previews
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[dangermattic]

	1 Warning
⚠️	This PR is larger than 500 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

Generated by 🚫 Danger

[wpmobilebot]

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	Commit	1933f30
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📲 You can test the changes from this Pull Request in 🚗 Automotive by scanning the QR code below to install the corresponding build.

	App Name	🚗 Automotive
	Build Type	debugProd
	Commit	1933f30
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📲 You can test the changes from this Pull Request in ⌚ Wear by scanning the QR code below to install the corresponding build.

	App Name	⌚ Wear
	Build Type	debugProd
	Commit	1933f30
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[geekygecko]

This worked well in my test. Thanks for making this fix!