Attempt crash discovery

[danielebogo]

This PR is an attempt to fix a crash introduced with #1604. The previous attempt #1756 didn't solve it.
This fix tries to decouple the intrinsicContentSize from the generic ThemeableTable by creating a new table used only in Discovery.

To test

As the previous attempt, I was unable to reproduce this issue. These are steps which I think may be causing the crash based on the stack traces:

Tap the Chromecast button from the player
Ensure that table is shown and app doesn't crash

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]

	2 Warnings
⚠️	View files have been modified, but no screenshot or video is included in the pull request. Consider adding some for clarity.
⚠️	This PR is assigned to the milestone 7.69 ❄️. The due date for this milestone has already passed. Please assign it to a milestone with a later deadline or check whether the release for this milestone has already been finished.

Generated by 🚫 Danger

[leandroalonso]

✅ Tested removing the overriden methods and checking the categories (podcasts don't show)
✅ Tested by adding it back and it works as expected