Add Nearby Fast Pair and discovered item artifacts - #1310
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Two artifacts from the Play services LevelDB stores nothing read before: the Fast Pair records for Bluetooth accessories, with the accessory's address, model, the name shown for it and its manufacturer, and the Nearby discovery cache, with the address seen, the signal strength and the times an item was first and last observed. Values are protobuf whose field numbers are Chromium's StoredDiscoveryItem. The mirrored Android storage views of a store are collapsed before it is opened, so a record is reported once rather than once per view. The Fast Pair table leads with the address because most records carry no timestamp. sample_data measured on 23 Android corpora. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Two artifacts from Play services LevelDB stores that nothing read today.
Values are protobuf and the field numbers are Chromium's StoredDiscoveryItem, from ash/quick_pair/proto/fastpair_data.proto: mac_address 4, device_name 6, title 7, description 8, last and first observation 10 and 11, state 17, rssi 22.
The mirrored Android storage views of one store are collapsed before it is opened, which took the counts on three images from 45, 15 and 78 rows down to 15, 5 and 26; single-view images are unchanged. Most Fast Pair records carry no observation timestamps, so that table leads with the address rather than a time and the notes say so. LevelDB keeps superseded copies of a key, and a Superseded column flags every copy but the newest. Measured on 23 Android corpora.
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