DuckPlayer updates and rewrites

[afterxleep]

Task/Issue URL: https://app.asana.com/0/0/1208563377656003/f Tech Design URL: CC:

Description:

DuckPlayer Updates

• Updates and streamlines DuckPlayer logic to be based on URL changes exclusively, which removes all decidePolicy logic and more stuff from TabViewController 🎉
• Adds New Tests to cover for more navigation scenarios
• Reviews and fixes DuckPlayer Pixel logic
• Removes DuckPlayer Launch Experiment

Open In New tab Updates

• Adds Open in New Tab Settings and pixel placeholders

Steps to test this PR:

Unit tests cover base DuckPlayer navigation scenarios, but you can:

1. Set DuckPlayer to Always Ask
2. Smoke Test links from SERP and YouTube Website
3. Set DuckPlayer to 'Always'
4. Smoke Test links from SERP and YouTube Website

Note: No new tab functionality is present in this PR.

[github-actions[bot]]

	Warnings
:warning:	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

	Messages
:book:	You seem to be updating localized strings. Make sure that you request translations and include translated strings before you ship your change. See Localization Guidelines for more information.

Generated by :no_entry_sign: dangerJS against 419a253f7bc833cf058d7988466cd0b2c1154668

[Bunn]

Code LGTM, but there's an issue I can reproduce on device, details here