Feature/channel filter final

[Ecomont]

What is it?

• Bugfix (user facing)
• Feature (user facing) ⚠️ Your PR must target the refactor branch
• Codebase improvement (dev facing)
• Meta improvement to the project (dev facing)

Description of the changes in your PR

• Added setHasOptionsMenu(true) in ChannelTabFragment to dynamically inject the standard "Eyeball" visibility toggle icon specifically within the Streams tab.
• Reused showStreamVisibilityDialog() and the existing feed_show_watched_items_key SharedPreferences to maintain a cohesive user experience with the main feed.
• Intercepted the RxJava streams in loadResult() and loadMoreItemsLogic() using .map() to apply the filter asynchronously off-thread, preventing UI frame drops.
• Implemented shouldIncludeItem() to query the HistoryRecordManager for local watch states, evaluating isFinished() and isValid() based on the user's preferences.
• Handled the Collections.unmodifiableList constraint from NewPipeExtractor by creating a filtered list and updating it via info.setRelatedItems(filteredItems), safely dropping unwatched/watched streams.

Before/After Screenshots/Screen Record

• Before:
  

- After:

screencast2.mp4

Fixes the following issue(s)

• Fixes Duplicate "Watched" Eyeball Filter on Channel View #13065

Relies on the following changes

APK testing

The APK can be found by going to the "Checks" tab below the title. On the left pane, click on "CI", scroll down to "artifacts" and click "app" to download the zip file which contains the debug APK of this PR. You can find more info and a video demonstration on this wiki page.

• I tested the changes using an emulator or a physical device.