Fix proguard configuration
Fix proguard configuration

PiperOrigin-RevId: 232835218

ened/ExoPlayer,amzn/exoplayer-amazon-port,stari4ek/ExoPlayer,androidx/media,saki4510t/ExoPlayer,superbderrick/ExoPlayer,google/ExoPlayer,androidx/media,amzn/exoplayer-amazon-port,superbderrick/ExoPlayer,superbderrick/ExoPlayer,saki4510t/ExoPlayer,google/ExoPlayer,ened/ExoPlayer,ened/ExoPlayer,stari4ek/ExoPlayer,google/ExoPlayer,stari4ek/ExoPlayer,amzn/exoplayer-amazon-port,androidx/media,saki4510t/ExoPlayer