Update Icing from upstream.
Descriptions:
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Integration test for embedding search
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Support embedding search in the advanced scoring language
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Support embedding search in the advanced query language
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Add missing header inclusions.
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Assign default values to MemoryMappedFile members to avoid temporary object error during std::move
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Use GetEmbeddingVector in EmbeddingIndex::TransferIndex
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Refactor SectionRestrictData
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Add EmbeddingIndex to IcingSearchEngine and create EmbeddingIndexingHandler
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Support optimize for embedding index
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Implement embedding search index
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Branch posting list accessor and serializer to store embedding hits
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Introduce embedding hit
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Update schema and document definition
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Add tests verifying that Icing will correctly save updated schema description fields.
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BUG: 326987971
BUG: 326656531
BUG: 329747255
Change-Id: I84f0a5a3f7fe133ece16c567a1f5f44e7866fd77
88 files changed
