Add Folders upsell flow to the podcast screen

[MiSikora]

Description

This PR adds Folders upsell flow to the Podcast screen. I also cleaned up the UI a touch by removing a redundant divider and removing a colored background form the button area.

Context: p1730075993721179-slack-C05RR9P9RAT

I'm not adding this to the changelog. I don't think it is worth it.

Testing Instructions

Note

Test this with the release variant on a device that is capable of doing test purchases.

1. Open the app as an unsigned user.
2. Subscribe to any podcast.
3. You should see a folder icon with a lock.
4. Tap on the icon.
5. The upsell flow should start.
6. Sign up using the flow.
7. When it comes to payment cancel it.
8. Go back to the podcast screen.
9. Tap on the folder icon again.
10. You should see the upsell screen.
11. Make a purchase.
12. Go back to the podcast screen.
13. The button should now have a regular folder icon.
14. Tap on it.
15. You should see folder management screen.

Screenshots or Screencast

Flow

screen-20241028-114146.mp4

Upsell icon

Before	After

Screen cleanup

Before	After

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.

I have tested any UI changes...

• with different themes
• with a landscape orientation
• with the device set to have a large display and font size
• for accessibility with TalkBack

[wpmobilebot]

📲 You can test the changes from this Pull Request in 📱 Mobile by scanning the QR code below to install the corresponding build.

	App Name	📱 Mobile
	Build Type	debugProd
	Commit	413967f
	Direct Download	pocketcasts-app-prototype-build-pr3115-413967f.apk

📲 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	413967f
	Direct Download	pocketcasts-automotive-prototype-build-pr3115-413967f.apk

📲 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	413967f
	Direct Download	pocketcasts-wear-prototype-build-pr3115-413967f.apk