Finalize 2.11.2 release notes
Finalize 2.11.2 release notes

PiperOrigin-RevId: 294943298

ened/ExoPlayer,amzn/exoplayer-amazon-port,stari4ek/ExoPlayer,amzn/exoplayer-amazon-port,google/ExoPlayer,ened/ExoPlayer,stari4ek/ExoPlayer,google/ExoPlayer,androidx/media,amzn/exoplayer-amazon-port,androidx/media,google/ExoPlayer,stari4ek/ExoPlayer,ened/ExoPlayer,androidx/media