Pass a channel argument from install_driver() to install_webdriver_by_version() (#46002)

When running WPT on Chrome Android, the below error happens.

  'TypeError: Chrome.install_webdriver_by_version() missing 1 required
   positional argument: 'channel''

This PR passes the channel argument to avoid the error.

Author: Gyuyoung

tools/wpt/browser.py

@@ -1452,7 +1452,7 @@ def install_webdriver(self, dest=None, channel=None, browser_binary=None):
         if browser_binary is None:
             browser_binary = self.find_binary(channel)
         chrome = Chrome(self.logger)
-        return chrome.install_webdriver_by_version(self.version(browser_binary), dest)
+        return chrome.install_webdriver_by_version(self.version(browser_binary), dest, channel)
 
     def version(self, binary=None, webdriver_binary=None):
         if not binary: