release build: v04.04.00

bug fix: add "RELEASED_ALL_BUT_CAST_SESSION" mode

issue this solves:

• in "BrowserActivity":
  • select video URL(s) to watch
• in "VideoActivity":
  • start a cast session
  • playlist of video URLs appears on screen
  • when a video in playlist is clicked:
    • video queue loads in Chromecast
    • position in queue skips to selected playlist item
  • "onPause" runs when Activity screen is closed
    • "PlayerManager" enters "CAST_ONLY" mode and releases all other resources
• in "BrowserActivity":
  • select video URL(s) to watch
• in "VideoActivity":
  • "onResume" runs and detects that "PlayerManager" is running in "CAST_ONLY" mode
    • previously:
      • "PlayerManager" transitioned: "CAST_ONLY" -> "RELEASED" -> "NORMAL"
      • "RELEASED" mode releases all resources, including closing the CastSession
      • "currentPlayer" is an instance of ExoPlayer
    • now:
      • "PlayerManager" transitions: "CAST_ONLY" -> "RELEASED_ALL_BUT_CAST_SESSION" -> "NORMAL"
      • "RELEASED_ALL_BUT_CAST_SESSION" mode is identical to "RELEASED", but CastSession is not closed
      • "currentPlayer" is an instance of CastPlayer
        • the previous video queue that was casting continues uninterupted
        • the new playlist of video URLs appears on screen
        • when a video in playlist is clicked:
          • new video queue loads in Chromecast
          • position in new queue skips to selected playlist item