@Test
  public void testJpegFileDescriptorDecode() throws Throwable {
    FileDescriptor fd = getImageFileDescriptor("redsquare.jpg");
    final Bitmap bitmap = mWebpBitmapFactory.decodeFileDescriptor(fd, null, null);

    // NULLSAFE_FIXME[Parameter Not Nullable]
    testBitmapDefault(bitmap, 20, 20);
  }
Return input stream for lossless webp

@return InputStream instance
static-webp/src/androidTest/java/com/facebook/webpsupport/WebpBitmapFactoryTest.java