Update mp4 vp9 test files to follow v1.0 spec

- Also updated relevant codec strings to match what is in the file
- Also Fix typo in mp4 vp9 encrypted media supported types test

BUG=580623

Review-Url: https://codereview.chromium.org/2847533002
Cr-Commit-Position: refs/heads/master@{#469865}
7 files changed