NPE in toneMap_hlgFrame_matchesGoldenFile and toneMap_pqFrame_matchesGoldenFile was created because a uEnableColorTransfer uniform was being created on the HDR path, when HDR shader files don't have this uniform. (they don't support disable color transfers right now)
Fix: only create the uniform when input is SDR.
manually tested on failing tests
PiperOrigin-RevId: 522002603
