Reset the simple frame dropping logic on flush or EOS.

#minor-release

PiperOrigin-RevId: 540633875

libraries/effect/src/androidTest/java/androidx/media3/effect/FrameDropTest.java

@@ -97,12 +97,13 @@ public class FrameDropTest {
                     /* expectedFrameRate= */ 6, /* targetFrameRate= */ 2))
             .build();
 
-    videoFrameProcessorTestRunner.registerAndQueueInputBitmap(
+    videoFrameProcessorTestRunner.registerInputStream(INPUT_TYPE_BITMAP);
+    videoFrameProcessorTestRunner.queueInputBitmap(
         readBitmap(ORIGINAL_PNG_ASSET_PATH),
         /* durationUs= */ C.MICROS_PER_SECOND,
         /* offsetToAddUs= */ 0L,
         /* frameRate= */ 4);
-    videoFrameProcessorTestRunner.registerAndQueueInputBitmap(
+    videoFrameProcessorTestRunner.queueInputBitmap(
         readBitmap(SCALE_WIDE_PNG_ASSET_PATH),
         /* durationUs= */ C.MICROS_PER_SECOND,
         /* offsetToAddUs= */ C.MICROS_PER_SECOND,

libraries/effect/src/main/java/androidx/media3/effect/SimpleFrameDroppingShaderProgram.java

@@ -63,4 +63,16 @@ import androidx.media3.common.VideoFrameProcessingException;
       inputListener.onReadyToAcceptInputFrame();
     }
   }
+
+  @Override
+  public void signalEndOfCurrentInputStream() {
+    super.signalEndOfCurrentInputStream();
+    framesReceived = 0;
+  }
+
+  @Override
+  public void flush() {
+    super.flush();
+    framesReceived = 0;
+  }
 }

libraries/test_utils/src/main/java/androidx/media3/test/utils/VideoFrameProcessorTestRunner.java

@@ -342,6 +342,20 @@ public final class VideoFrameProcessorTestRunner {
     endFrameProcessing();
   }
 
+  public void registerInputStream(@InputType int inputType) {
+    videoFrameProcessor.registerInputStream(inputType, ImmutableList.of());
+  }
+
+  public void queueInputBitmap(
+      Bitmap inputBitmap, long durationUs, long offsetToAddUs, float frameRate) {
+    videoFrameProcessor.setInputFrameInfo(
+        new FrameInfo.Builder(inputBitmap.getWidth(), inputBitmap.getHeight())
+            .setPixelWidthHeightRatio(pixelWidthHeightRatio)
+            .setOffsetToAddUs(offsetToAddUs)
+            .build());
+    videoFrameProcessor.queueInputBitmap(inputBitmap, durationUs, frameRate);
+  }
+
   public void registerAndQueueInputBitmap(
       Bitmap inputBitmap, long durationUs, long offsetToAddUs, float frameRate) {
     videoFrameProcessor.setInputFrameInfo(