on.soundcloud fixes

[mjsir911]

• I carefully read the contribution guidelines and agree to them.
• I have tested the API against NewPipe.
• I agree to create a pull request for NewPipe as soon as possible to make it compatible with the changed API.

TeamNewPipe/NewPipe#12694

also related: 02e14b8

The name change commit isn't necessary but I would appreciate it for git history view consistency

[mjsir911]

I'm unsure how to run this with RecordingDownloader like the failing tests say -- they successfully run on my machine

[TobiGr]

The tests are failing because you changed tests which require requests to external servers. To minimize the load on external servers and to make tests more reliable we are using so called "mocks" to simulate the requests. This is done by "recording" network requests and using those records when running the tests. See https://teamnewpipe.github.io/documentation/05_Mock_tests/ for more info.
I'll record the mocks later today for your PR. Don't worry about it.

[TobiGr]

thank you!