Exit early progressive loads if the load task is canceled

Add an check when loading progressive media in case the load
is canceled. If the player is released very early, the progressive
media period may carry on with the initial loading unnecessarily.

PiperOrigin-RevId: 586288385
(cherry picked from commit 3d1d8f4439)

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/source/ProgressiveMediaPeriod.java

@@ -1027,6 +1027,9 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
           long position = positionHolder.position;
           dataSpec = buildDataSpec(position);
           long length = dataSource.open(dataSpec);
+          if (loadCanceled) {
+            break;
+          }
           if (length != C.LENGTH_UNSET) {
             length += position;
             onLengthKnown();