Reword MAXIMUM_AVERAGE_PIXEL_ABSOLUTE_DIFFERENCE javadoc.

MAXIMUM_AVERAGE_PIXEL_ABSOLUTE_DIFFERENCE was copied from a test
class, but BitmapTestUtil isn't a test. So the javadoc needs
rewording to reflect that.

PiperOrigin-RevId: 438001833

libraries/transformer/src/androidTest/java/androidx/media3/transformer/BitmapTestUtil.java

@@ -64,18 +64,18 @@ public class BitmapTestUtil {
   public static final String ROTATE45_SCALE_TO_FIT_EXPECTED_OUTPUT_PNG_ASSET_STRING =
       "media/bitmap/sample_mp4_first_frame_rotate_45_scale_to_fit.png";
   /**
-   * Maximum allowed average pixel difference between the expected and actual edited images for the
-   * test to pass. The value is chosen so that differences in decoder behavior across emulator
-   * versions don't affect whether the test passes for most emulators, but substantial distortions
-   * introduced by changes in the behavior of the {@link GlFrameProcessor GlFrameProcessors} will
-   * cause the test to fail.
+   * Maximum allowed average pixel difference between the expected and actual edited images in pixel
+   * difference-based tests. The value is chosen so that differences in decoder behavior across
+   * emulator versions don't affect whether the test passes for most emulators, but substantial
+   * distortions introduced by changes in the behavior of the {@link GlFrameProcessor
+   * GlFrameProcessors} will cause the test to fail.
    *
-   * <p>To run this test on physical devices, please use a value of 5f, rather than 0.1f. This
-   * higher value will ignore some very small errors, but will allow for some differences caused by
-   * graphics implementations to be ignored. When the difference is close to the threshold, manually
-   * inspect expected/actual bitmaps to confirm failure, as it's possible this is caused by a
-   * difference in the codec or graphics implementation as opposed to a {@link GlFrameProcessor}
-   * issue.
+   * <p>To run pixel difference-based tests on physical devices, please use a value of 5f, rather
+   * than 0.1f. This higher value will ignore some very small errors, but will allow for some
+   * differences caused by graphics implementations to be ignored. When the difference is close to
+   * the threshold, manually inspect expected/actual bitmaps to confirm failure, as it's possible
+   * this is caused by a difference in the codec or graphics implementation as opposed to a {@link
+   * GlFrameProcessor} issue.
    */
   public static final float MAXIMUM_AVERAGE_PIXEL_ABSOLUTE_DIFFERENCE = 0.1f;