ce9ec79e59
Note that we still have null timelines in ExoPlayerImplInternal. This is deliberate; and is likely necessary to distinguish between the no-timeline-yet and timeline-is-empty cases (we want to try and process a pending seek for the latter, but not the former). ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=140200980