Merge pull request #436 from jaeho-lee104:feature/improve_condition

PiperOrigin-RevId: 540875285
(cherry picked from commit 9fd38c16eeb9e64ff62a0a47ae6e174bb8de8d43)

library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java

@@ -461,7 +461,8 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
       previousReason = Iterables.getLast(queue).trackSelectionReason;
     }
     int newSelectedIndex = determineIdealSelectedIndex(nowMs, chunkDurationUs);
-    if (!isTrackExcluded(previousSelectedIndex, nowMs)) {
+    if (newSelectedIndex != previousSelectedIndex
+        && !isTrackExcluded(previousSelectedIndex, nowMs)) {
       // Revert back to the previous selection if conditions are not suitable for switching.
       Format currentFormat = getFormat(previousSelectedIndex);
       Format selectedFormat = getFormat(newSelectedIndex);