Auto-Downloading of Episode: Add logic for auto downloads limits

[SergioEstevao]

| 📘 Part of: #2284 |
|:---:|

Fixes #

1	2	3	4

This PR adds the necessary logic to implement auto-downloads of episodes when subscribing following the set limits of auto-downloads.

To test

Setup

1. Delete the app of a device
2. Start the app
3. Ensure that you have the FF autoDownloadOnSubscribe enabled
4. Go to Profile -> Settings -> AutoDownload
5. Check that you have by default Auto-Download enabled ( this is for new installs of the app)
6. Check that the default limit for auto-downloads is two episodes

Subscribe on Episode

1. Go to discover
2. Open a podcast there
3. Press the subscribe button
4. Check that you see the download of the latest x amount of episodes you have set on Auto-Downloads limits
5. Play the episodes

Subscribe on Discover directly

1. Go to discover
2. Scroll around
3. On the trending list tap directly on +
4. Open the podcast and see if downloads are triggered
5. Scroll more on discover and find a podcast with an image and a plus button
6. Tap on plus button
7. Check that the downloads are triggered

Disable auto-download setting

1. Disable auto-download settings on Settings
2. Repeat the subscriptions above and see that no auto-downloads are triggered.

Disable the FF for autoDownloadOnSubscribe

1. Check that no downloads are triggered on subscribe of podcasts
2. Note that there was na exception on the old code that if all your podcasts are on auto-download a new subscription will also be part of auto-downloads.

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 7.76. This milestone is due in less than 2 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

Generated by 🚫 Danger

[danielebogo]

Tested all scenarios and it's working well ✅
Also restested the scenario 1 after the last commit and it's working correctly