After upgrade to exoplayer 2.13.3, live playback speed became to variant speed.  #9329

After upgrade to exoplayer 2.13.x onwards, the live playback speed became variant speed between range [0.97, 1.03], even for normal non-low latency live stream.

• URI to test content for reproduction
  https://livesim.dashif.org/livesim/mup_30/testpic_2s/Manifest.mpd"

• ExoPlayer version number
  Tested with 2.13.3

• Android version
  android 11

• Android device
  Samsung SM-P610

Since the 2.13.0, exoplayer introduce DefaultLivePlaybackSpeedControl.java, getAdjustedPlaybackSpeed function looks check

DefaultLivePlaybackSpeedControl.java
if (mediaConfigurationTargetLiveOffsetUs == C.TIME_UNSET) {
return 1f;
}
and mediaConfigurationTargetLiveOffsetUs = C.msToUs(liveConfiguration.targetOffsetMs);

Because of DASH's DashMediaSource.java updateMediaItemLiveConfiguration logic
private void updateMediaItemLiveConfiguration(long nowInWindowUs, long windowDurationUs) {

Based on current implementation DashMediaSource targetOffsetMs's can not be TIME_UNSET any more, that means all live stream will play live stream with variant playback speed.