Disable offload scheduling at set up for track transition

While sleeping for offload, position is estimated based on time playing. If asleep and AudioTrack is reused, then the position will keep incrementing as the subsequent item plays. That is until wakeup when playing position is updated to the timestamp of the second item. Offload scheduling should be disabled until track transitions fully.

PiperOrigin-RevId: 570397140
(cherry picked from commit da06bf057a)

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/ExoPlayerImplInternal.java

@@ -2251,6 +2251,11 @@ import java.util.concurrent.atomic.AtomicBoolean;
             readingPeriodHolder.getStartPositionRendererTime(),
             readingPeriodHolder.getRendererOffset(),
             readingPeriodHolder.info.id);
+        if (offloadSchedulingEnabled) {
+          // Prevent sleeping across offload track transition else position won't get updated.
+          // TODO: (b/183635183) Optimize Offload End-Of-Stream: Sleep to just before end of track
+          setOffloadSchedulingEnabled(false);
+        }
       } else if (renderer.isEnded()) {
         // The renderer has finished playback, so we can disable it now.
         disableRenderer(renderer);