Update Icing from upstream.
Descriptions:
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Allow adding duplicate hits with the same value into the posting list.
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Support an extension to the encoded Hit in Icing's posting list.
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Adds description fields to SchemaTypeConfigProto and PropertyConfigProto
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Support polymorphism in type property filters
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Fix posting list GetMinPostingListSizeToFit size calculation bug
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Add instructions to error message for advanced query backward compat.
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BUG: 294274922
BUG: 321107391
BUG: 324908653
BUG: 326987971
Change-Id: I9e8e0589a9682ee14ac34ded32b959c1ef64d84d
30 files changed