See https://chromium-review.googlesource.com/c/458577/ .

If I click on "try jobs", I get a lightbox that shows a search box , tryserver.chromium.android, builders under tryserver.chromium.android, and headers for the other chromium tryservers (but no builders).

I can check box and type something in the search box, but typing in the search box appears to have no effect, and I can't see any of the builders from the non-android masters, so I'd say this doesn't really work :(.