Effect: Update javadoc to remove "final effect" references

"Final" was likely added to reference the FinalMatrixTextureProcessorWrapper,
which is a package-private class. However, I think more clear to express that
this is the input size, which then has all effects applied, to get the output
size.

PiperOrigin-RevId: 477975358

libraries/common/src/main/java/androidx/media3/common/FrameProcessor.java

@@ -74,10 +74,13 @@ public interface FrameProcessor {
   interface Listener {
   interface Listener {
 
 
     /**
     /**
-     * Called when the output size after applying the final effect changes.
+     * Called when the output size changes.
      *
      *
-     * <p>The output size after applying the final effect can differ from the size specified using
-     * {@link #setOutputSurfaceInfo(SurfaceInfo)}.
+     * <p>The output size is the frame size in pixels after applying all {@linkplain Effect
+     * effects}.
+     *
+     * <p>The output size may differ from the size specified using {@link
+     * #setOutputSurfaceInfo(SurfaceInfo)}.
      */
      */
     void onOutputSizeChanged(int width, int height);
     void onOutputSizeChanged(int width, int height);