Dont report IDLE state when loader error

[crossle]

Playback HLS stream, when loader error com.google.android.exoplayer.upstream.HttpDataSource$HttpDataSourceException:, onError receive the error, but then why onStateChanged receive the IDLE state? use the latest version, before work well.

[ojw28]

It's always been well documented that the state transitions to IDLE after playback fails here. This is not new behavior.