Update status of flaky co19 media test on Windows Firefox
Update status of flaky co19 media test on Windows Firefox

Updates the status changes made in commits
3809d92e2d688c42a3c66dcc6b2335133f93f4b7
and
185b276d489769007edbda31c0f3fa8e9fc082d4

R=eernst@google.com

Change-Id: Idccff4e66555645dfa011d137fbdc0a22a37b61c
Reviewed-on: https://dart-review.googlesource.com/42683
Reviewed-by: William Hesse <a821cddceae7dc400f272e3cb1a72f400f9fed6d@google.com>

dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk