- Attach types for placeholder sessions. If a placeholder session will be
attached and a downstream renderer doesn't know what to do with it, then
this attachment is necessary to correctly determine that the renderer
does not support the track.
- Attach types to sample formats. Without this, if playback fails due to
a CryptoException, the ExoPlaybackException that gets thrown spuriously
indicates that the format's DRM type was not supported.
PiperOrigin-RevId: 325214745
