Definition
Media Session defines MediaSessionAction
enum MediaSessionAction {
"play",
"pause",
"seekbackward",
"seekforward",
"previoustrack",
"nexttrack",
"skipad",
"stop",
"seekto",
"togglemicrophone",
"togglecamera",
"hangup",
"previousslide",
"nextslide",
"enterpictureinpicture"
};