This method works by reflectively loading classes from the `lib-effect`
module, in order to avoid a hard dependency on this module for ExoPlayer
users that don't want video effect functionality. This change ensures
that a failure to load the necessary classes fails immediately, instead
of on a later thread inside `MediaCodecVideoRenderer` when the
reflection currently happens.
Also update the javadoc to make the dependency requirement clear.
#minor-release
PiperOrigin-RevId: 601387957
a6812156e6