Update Gradle version to 4.1.1
Update Gradle version to 4.1.1

This was suggested by AndroidStudio.

PiperOrigin-RevId: 353879939

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