Report dropped frames from the VideoSink

After 4fad529433, MediaCodecVideoRenderer does not report if frames
are dropped from the VideoSink. This commit fixes this.

#minor-release

PiperOrigin-RevId: 571905721

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/video/CompositingVideoSinkProvider.java

@@ -552,7 +552,9 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     private void releaseProcessedFrameInternal(long releaseTimeNs, boolean isLastFrame) {
       videoFrameProcessor.renderOutputFrame(releaseTimeNs);
       processedFramesBufferTimestampsUs.remove();
-      if (releaseTimeNs != VideoFrameProcessor.DROP_OUTPUT_FRAME) {
+      if (releaseTimeNs == VideoFrameProcessor.DROP_OUTPUT_FRAME) {
+        renderControl.onFrameDropped();
+      } else {
         renderControl.onFrameRendered();
         if (!renderedFirstFrame) {
           if (listener != null) {

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/video/MediaCodecVideoRenderer.java

@@ -564,6 +564,12 @@ public class MediaCodecVideoRenderer extends MediaCodecRenderer implements Video
     lastRenderRealtimeUs = Util.msToUs(getClock().elapsedRealtime());
   }
 
+  @Override
+  public void onFrameDropped() {
+    updateDroppedBufferCounters(
+        /* droppedInputBufferCount= */ 0, /* droppedDecoderBufferCount= */ 1);
+  }
+
   // Other methods
 
   /**

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/video/VideoSink.java

@@ -100,6 +100,9 @@ import java.util.concurrent.Executor;
 
     /** Informs the rendering control that a video frame was rendered. */
     void onFrameRendered();
+
+    /** Informs the rendering control that a video frame was dropped. */
+    void onFrameDropped();
   }
 
   /**

libraries/exoplayer/src/test/java/androidx/media3/exoplayer/video/CompositingVideoSinkProviderTest.java

@@ -175,5 +175,8 @@ public final class CompositingVideoSinkProviderTest {
 
     @Override
     public void onFrameRendered() {}
+
+    @Override
+    public void onFrameDropped() {}
   }
 }