Bug 1850541 - [ci] Enable mochitest-browser-media with Wayland, r=jmaher

Depends on D187039

Differential Revision: https://phabricator.services.mozilla.com/D187042

taskcluster/ci/test/mochitest.yml

@@ -362,7 +362,6 @@ mochitest-browser-media:
             default:
                 by-test-platform:
                     android.*: []
-                    .*wayland.*: []
                     default: built-projects
     tier: default
     max-run-time: