samrobinson 83bc474f3c Clarify case where HDR encoder and muxer have no shared mime type.
The prior version (with the call to createEncodingException) could
never occur as select...SupportedMimeType already checks for HDR
editing support. This change ensures we throw before creating an
encoder, gives a better error code and allows future simplifications
around createForCodec (see child CL).

PiperOrigin-RevId: 506308290
2023-02-02 16:05:21 +00:00
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