0b4284d060
It's only "needed" for HLS, and this requirement will go away soon. It's safe to remove the flag ahead of this because a TrackSelector can/should not attempt to adapt between multiple audio/text tracks. Also remove unnecessary restrictions on TrackGroups being non-empty and only of known types. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=128376601