Add Maven publishing support
Add Maven publishing support

The release AAR and Android sources are included for each published artifact.

Issue: #5246
Issue: #8353

#minor-release

PiperOrigin-RevId: 358146555

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