showsHdr
True when this renderer, on the display it draws to now, shows HDR as HDR under io.github.yuroyami.kiteplayer.HdrPolicy.Auto, rather than tone mapping it (#447). The engine reads it when it chooses an adaptive stream's variant, so an HDR display gets the HDR version and a standard one the SDR version. Defaulted to false, for a renderer that always tone maps.