PlayerTrackEmsgHandler: Release sample queue in release()

This change makes it clear the SampleQueue doesn't outlive
the wrapping PlayerTrackEmsgHandler, and releases it from
PlayerTrackEmsgHandler.release().

This change is a no-op because calling release() is the
same as reset() in this case (the behavior only differs if
a non-dummy DrmSessionManager is being used).

PiperOrigin-RevId: 289416622

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/PlayerEmsgHandler.java

@@ -196,8 +196,7 @@ public final class PlayerEmsgHandler implements Handler.Callback {
 
   /** Returns a {@link TrackOutput} that emsg messages could be written to. */
   public PlayerTrackEmsgHandler newPlayerTrackEmsgHandler() {
-    return new PlayerTrackEmsgHandler(
-        new SampleQueue(allocator, DrmSessionManager.getDummyDrmSessionManager()));
+    return new PlayerTrackEmsgHandler(allocator);
   }
 
   /** Release this emsg handler. It should not be reused after this call. */
@@ -284,9 +283,8 @@ public final class PlayerEmsgHandler implements Handler.Callback {
     private final FormatHolder formatHolder;
     private final MetadataInputBuffer buffer;
 
-    /* package */ PlayerTrackEmsgHandler(SampleQueue sampleQueue) {
-      this.sampleQueue = sampleQueue;
-
+    /* package */ PlayerTrackEmsgHandler(Allocator allocator) {
+      this.sampleQueue = new SampleQueue(allocator, DrmSessionManager.getDummyDrmSessionManager());
       formatHolder = new FormatHolder();
       buffer = new MetadataInputBuffer();
     }
@@ -349,7 +347,7 @@ public final class PlayerEmsgHandler implements Handler.Callback {
 
     /** Release this track emsg handler. It should not be reused after this call. */
     public void release() {
-      sampleQueue.reset();
+      sampleQueue.release();
     }
 
     // Internal methods.