- Parse multiple kids from default_KID. It's specified as a whitespace
separated list of UUIDs rather than a single UUID.
- Opportunistically proceed with playback in cases where the manifest
only defines a single SchemeData with the common PSSH UUID. In such
cases the manifest isn't saying anything about which specific DRM
schemes it supports.
Issue: #3630
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=180675056
