andrewlewis 576f362912 Update playbackInfo even if there's no period holder
This is required to correctly update the playbackInfo.periodId when
seeking close to the end of a period with ads, as the seek operation
leads to an immediate source info refresh when midroll ads are marked as
played.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=164257099
2017-08-04 17:55:35 +01:00
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