Update multi select toolbars setup

[ashiagr]

Description

This sets up separate multi-select toolbars for episodes and bookmarks instead of reusing the same toolbar and setting it up based on the selected tab on the podcast details screen.

4ef7ddd is a cherry pick from an unmerged PR to help with testing.

Testing Instructions

Bookmarks enabled

0. Enable the Patron and Bookmarks feature
1. Login with a Patron account
2. Open a podcast
3. Long press on an episode row
4. ✅ Notice that the episode multi-select toolbar is shown
5. Select a few episodes
6. ✅ Notice that correct episodes are selected
7. Tap on the Bookmarks tab
8. Notice that
   • Episodes multi-select toolbar is closed
   • Bookmarks multi-select toolbar is shown
9. Select a few bookmarks
10. ✅ Notice that correct bookmarks are selected
11. Tap on the Episodes tab
12. ✅ Notice that
    • Bookmarks multi-select toolbar is closed
    • Episodes multi-select toolbar is shown

Bookmarks disabled

0. Disable the Bookmarks feature
1. Open a podcast
2. Long press on an episode row
3. ✅ Notice that the episode multi-select toolbar is shown
4. Select a few episodes
5. ✅ Notice that correct episodes are 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 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