Playback 2023: prompt user to share when a screenshot is taken

[ashiagr]

📘 Part of: #1463

Detects when a user takes a screenshot and displays an alert.

Testing Instructions

1. Make sure you're logged in to an account that has a few episodes listened to this year and last year
2. Go to Profile
3. Open stories
4. Notice you get permission to read photos
5. Allow permission
6. When stories are loaded, take a screenshot
7. ✅ You should see an alert and the stories should pause
8. Tap "Not now"
9. ✅ Stories should resume
10. Take another screenshot
11. Tap "Share"
12. ✅ The share sheet should appear
13. Dismiss it
14. ✅ Stories should resume
15. Take another screenshot
16. Tap "Share"
17. Share the story from the share sheet that appears
18. ✅ Hashtags and share text should be present on the shared story

** It might be good to test on Android 12, Android 13, and Android 14 devices.

Screenshots or Screencast

Android 12	Android 13

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 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

[pocketcasts]

	1 Error
🚫	Please add tests for class ScreenshotDetector (or add unit-tests-exemption label to ignore this).

Generated by 🚫 Danger

[ashiagr]

Closing this PR as per internal discussion: p1699615565224589/1699481796.875689-slack-C041BGTFQ5R