Variable: DEFAULT_PLAYBACK_RESUMPTION

const DEFAULT_PLAYBACK_RESUMPTION: false = false;

Defined in: packages/media-session/src/validate.ts:566

Playback resumption is off unless the app asks for it.

It is the one feature here that starts a foreground service in a process the user did not open, from a snapshot written by an earlier process. That is a lot of trust to hand an app by default, so it stays opt-in until it has been exercised on more hardware than the machine this was written on.