Update release notes to cherry-pick 32-bit WAVE support
Update release notes to cherry-pick 32-bit WAVE support

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=180661355

ened/ExoPlayer,ened/ExoPlayer,KiminRyu/ExoPlayer,MaTriXy/ExoPlayer,kiall/ExoPlayer,amzn/exoplayer-amazon-port,stari4ek/ExoPlayer,tntcrowd/ExoPlayer,ebr11/ExoPlayer,tntcrowd/ExoPlayer,stari4ek/ExoPlayer,androidx/media,superbderrick/ExoPlayer,saki4510t/ExoPlayer,tntcrowd/ExoPlayer,androidx/media,ebr11/ExoPlayer,google/ExoPlayer,amzn/exoplayer-amazon-port,KiminRyu/ExoPlayer,saki4510t/ExoPlayer,KiminRyu/ExoPlayer,saki4510t/ExoPlayer,amzn/exoplayer-amazon-port,ened/ExoPlayer,stari4ek/ExoPlayer,MaTriXy/ExoPlayer,superbderrick/ExoPlayer,kiall/ExoPlayer,androidx/media,superbderrick/ExoPlayer,MaTriXy/ExoPlayer,ebr11/ExoPlayer,kiall/ExoPlayer,google/ExoPlayer,google/ExoPlayer