Use the youtubei API for YouTube mixes. The corresponding has been updated because the new API breaks the tests of YoutubeMixPlaylistExtractorTest.
Remove some deprecated code (the old search code with the pbj JSON) and do some other improvements.
Add the origin and the referer headers with the https://www.youtube.com value for YouTube JSON POST requests.
Don't add the consent cookie header for the requests which use the youtubei/innertube API because it's uneeded.
Fix some tests and update YouTube mocks
This is needed so that a request is made for each test class when running multiple at once. This way RecordingDownloader records all necessary requests.
This works as long as tests are run sequentially and not in parallel.
Channel mix adjusments and test
Don't accept youtube music mix urls as playlist
Don't override playlistData to keep getInitialPage()
Remove json constants
Indentation
Move thumbnail id exctraction code to getThumbnailUrlFromId
Add test for "My mix" detection to service tests
Use ITEM_COUNT_UNKNOWN everywhere instead of -1 and add some tests
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XiangRongLin
TobiGr