Mark h264 > 1080p Cobalt Spherical test cases as optional
Mark h264 > 1080p Cobalt Spherical test cases as optional

GitOrigin-RevId: 8fe3eaab2aa67445e8dffd5135b10408d5639673

youtube/js_mse_eme,youtube/js_mse_eme,youtube/js_mse_eme