Add share option to multiselect menu

[mchowning]

Description

This adds a share option to the multiselect menus as requested in the https://github.com/Automattic/pocket-casts-android/discussions/1168 discussion.

Related iOS PR: Automattic/pocket-casts-ios#969

Testing Instructions

Showing the new option for previous users

1. Checkout and run main
2. Go to any podcast and long press any episode
3. Tap "..."
4. Tap the pencil icon
5. Reorder and tap "Done"
6. Run this branch
7. Go to any podcast and long press an episode
8. Tap "..."
9. ✅ "Share" should appear

Testing share action

2. Go to any podcast and long press a single episode
3. Tap "..."
4. Tap "Share"
5. ✅ The share sheet should appear
6. Dismiss it
7. Select more episodes
8. ✅ "Share" should not be available (only sharing a single episode is available)

Reordering

2. Go to any podcast and long press a single episode
3. Tap "..."
4. Tap the pencil icon
5. Move "Share" to be one of the first two actions
6. Tap "Done"
7. ✅ Share should be displayed on the action bar
8. Tap it
9. ✅ The share sheet should appear
10. Dismiss it
11. Select more episodes
12. ✅ The share button will be replaced by the next available action
13. Tap "..." and then the pencil icon
14. Move "Share" to below
15. Tap "Done"
16. ✅ "Share" should not be available as you have multiple selected episodes

User Episodes

1. Go to Files and long press one of your files
2. ✅ Observe that the share option does not appear in either the toolbar or the overflow menu

Events

Sharing

3. Go to any podcast and long press any episode
4. Tap Share
5. ✅ When showing the share sheet you should see a podcast_shared event with "type": "episode" and "source": "multi_select"].

Reordering

1. To to any podcast and long press any episode
2. Tap "..." and then the pencil icon
3. Move the share action
4. ✅ You should see a multi_select_view_overflow_menu_rearrange_action_moved event with an "action": "share" property.

Screenshots or Screencast

Screen.Recording.2023-07-21.at.5.11.57.PM.mov

Checklist

• If this is a user-facing change, I have added an entry in CHANGELOG.md
• 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

[geekygecko]

It worked well for me. Good work!