The null-behaviour of these methods creates a minimization footgun,
because **any** call to these setters will prevent R8 from removing
the default implementation (even if it's never used by the app) - this
is because R8 can't tell the default implementation is only used if the
parameter is `null`.
Follow-up to https://github.com/androidx/media/commit/07302a23bd5894d57514c68b2db499ac46726e77
PiperOrigin-RevId: 450395941
