block media keys from html audio pause
navigator.mediaSession.setActionHandler('play', function() { /* Code excerpted. */ });
navigator.mediaSession.setActionHandler('pause', function() { /* Code excerpted. */ });
navigator.mediaSession.setActionHandler('seekbackward', function() { /* Code excerpted. */ });
navigator.mediaSession.setActionHandler('seekforward', function() { /* Code excerpted. */ });
navigator.mediaSession.setActionHandler('previoustrack', function() { /* Code excerpted. */ });
navigator.mediaSession.setActionHandler('nexttrack', function() { /* Code excerpted. */ });