Feature request: iOS lock screen controls and Android MediaSession for background playback

[Yummy-sk]

Current state (v1.6.0)

playInBackground + notificationTitle/notificationText provide a MediaStyle
notification on Android. However:

• iOS has no lock screen / control center presence at all — no Now Playing
  info, no remote commands, and playback does not resume after interruptions
  (phone calls, alarms)
• Android notification has no MediaSessionCompat — so it does not appear
  in the media carousel / lock screen on Android 11+, and Bluetooth/headset
  media buttons are not handled
• No artwork (thumbnail) on either platform

Proposal

• iOS: MPNowPlayingInfoCenter + MPRemoteCommandCenter (play/pause),
  and auto-resume after interruptions via the shouldResume hint
• Android: back the existing notification with a MediaSessionCompat
  (media carousel, lock screen, media buttons)
• Both: optional artwork, e.g. notification={{ title, description, thumbnail }}