Disable flaky Chromium test DefaultBrowserManagerWinBrowserTest.ClickAcceptTriggersSetterAndMetric This is an upstream Chromium test with a 1.8% flake rate over 30 days per LUCI Analysis. The failure is a COM interface reference leak (CheckForLeakedAxPlatformNodes detects ghost_count=1) in the notification accessibility tree during test teardown, not a test logic failure. Brave's chromium_src overrides only replace DefaultBrowserWorker with BraveDefaultBrowserWorker, which is unrelated to accessibility/COM node cleanup. Resolves https://github.com/brave/brave-browser/issues/53421