This patch adds telemetry to help us determine if mp4s with certain structures
can occur in the wild. Specifically:
- How often do mp4s have multiple entries in the sample description box?
- Do we ever see mp4s with multiple codecs in the sample description box?
- Do we ever see mp4s with multiple sets of crypto info in the sample
description box?
This information is collected each time we parse mp4 metadata.
Remove some diagnostic asserts now that we're gracefully gathering info.
Reshuffle of DecoderData function order to align with the order in the header.
Differential Revision: https://phabricator.services.mozilla.com/D14426
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extra : moz-landing-system : lando
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