Surface player release timeouts

Also make sure the demo app doesn't crash when it happens.

PiperOrigin-RevId: 490725959

demos/transformer/src/main/java/com/google/android/exoplayer2/transformerdemo/TransformerActivity.java

@@ -454,7 +454,9 @@ public final class TransformerActivity extends AppCompatActivity {
     "transformationStopwatch",
   })
   private void onTransformationError(TransformationException exception) {
-    transformationStopwatch.stop();
+    if (transformationStopwatch.isRunning()) {
+      transformationStopwatch.stop();
+    }
     informationTextView.setText(R.string.transformation_error);
     progressViewGroup.setVisibility(View.GONE);
     debugFrame.removeAllViews();

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/TransformerInternal.java

@@ -430,8 +430,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
     private void handleTransformationEnded(
         @Nullable TransformationException transformationException) {
-      Util.postOrRun(
-          handler,
+      handler.post(
           () -> {
             @Nullable TransformationException releaseException = null;
             try {