Trouble following "Chrome for Android" documentation

[brycethomas]

I've hit a few issues following this doc for the first time: https://web-platform-tests.org/running-tests/chrome_android.html

1. The doc states "If you have previously run ./wpt run against Chrome, you might need to remove _venv/bin/chromedriver so that we can install the correct ChromeDriver corresponding to your Chrome for Android version.". I have previously run ./wpt run against Chrome, so I had a look for the file _venv/bin/chromedriver but I didn't find a _venv/ directory. The closest directory I found was _venv3/bin/, but it didn't contain a file named chromedriver. It would be good to clarify/update what file(s) if any need to be deleted.
2. Moving on, I tried running this command based on the docs: ./wpt run --test-type=testharness --channel=stable chrome_android TESTS. This threw an error: TypeError: Chrome.install_webdriver_by_version() missing 1 required positional argument: 'channel'. I was able to get past that issue by passing channel as the final argument in the code here:

   wpt/tools/wpt/browser.py

   Line 1450 in 2c931fe

   return chrome.install_webdriver_by_version(self.version(browser_binary), dest)

3. Now, running the tests fails with the message CRITICAL Max restarts exceeded. Here's the full output of an example test run:

$ ./wpt run --test-type=testharness --channel=stable chrome_android fetch/api/request/url-encoding.html
Download and install chromedriver [Y/n]? Y
Running 1 tests in web-platform-tests

8000
8001
8888
8889
8443
8444
CRITICAL Max restarts exceeded
Ran 0 tests finished in 4.9 seconds.
  • 0 ran as expected. 0 tests skipped.

I found this open issue from 2020 that looks like it might be related: #26233 .

General question: I see the docs mention Android support is "prototype". Would it be fair to say not many people are using it/supporting its further development? For example the second issue above (passing the channel argument) seems like something someone would have run into a while back if these instructions were in use?