feat(safebrowsing): update the api

#### safebrowsing:v4

The following keys were deleted:
- schemas.Checksum (Total Keys: 4)
- schemas.ClientInfo (Total Keys: 4)
- schemas.Constraints (Total Keys: 11)
- schemas.Empty (Total Keys: 2)
- schemas.FetchThreatListUpdatesRequest (Total Keys: 5)
- schemas.FetchThreatListUpdatesResponse (Total Keys: 6)
- schemas.FindFullHashesRequest (Total Keys: 8)
- schemas.FindFullHashesResponse (Total Keys: 8)
- schemas.FindThreatMatchesRequest (Total Keys: 4)
- schemas.FindThreatMatchesResponse (Total Keys: 4)
- schemas.ListThreatListsResponse (Total Keys: 4)
- schemas.ListUpdateRequest (Total Keys: 8)
- schemas.ListUpdateResponse (Total Keys: 13)
- schemas.MetadataEntry (Total Keys: 6)
- schemas.RawHashes (Total Keys: 6)
- schemas.RawIndices (Total Keys: 5)
- schemas.RiceDeltaEncoding (Total Keys: 10)
- schemas.ThreatEntry (Total Keys: 17)
- schemas.ThreatHit (Total Keys: 9)
- schemas.ThreatInfo (Total Keys: 10)
- schemas.ThreatListDescriptor (Total Keys: 5)
- schemas.ThreatMatch (Total Keys: 9)
- schemas.ThreatSource (Total Keys: 5)
- schemas.UserInfo (Total Keys: 5)

The following keys were added:
- schemas.GoogleProtobufEmpty (Total Keys: 2)
- schemas.GoogleSecuritySafebrowsingV4Checksum (Total Keys: 4)
- schemas.GoogleSecuritySafebrowsingV4ClientInfo (Total Keys: 4)
- schemas.GoogleSecuritySafebrowsingV4FetchThreatListUpdatesRequest (Total Keys: 24)
- schemas.GoogleSecuritySafebrowsingV4FetchThreatListUpdatesResponse (Total Keys: 19)
- schemas.GoogleSecuritySafebrowsingV4FindFullHashesRequest (Total Keys: 8)
- schemas.GoogleSecuritySafebrowsingV4FindFullHashesResponse (Total Keys: 8)
- schemas.GoogleSecuritySafebrowsingV4FindThreatMatchesRequest (Total Keys: 4)
- schemas.GoogleSecuritySafebrowsingV4FindThreatMatchesResponse (Total Keys: 4)
- schemas.GoogleSecuritySafebrowsingV4ListThreatListsResponse (Total Keys: 4)
- schemas.GoogleSecuritySafebrowsingV4RawHashes (Total Keys: 6)
- schemas.GoogleSecuritySafebrowsingV4RawIndices (Total Keys: 5)
- schemas.GoogleSecuritySafebrowsingV4RiceDeltaEncoding (Total Keys: 10)
- schemas.GoogleSecuritySafebrowsingV4ThreatEntry (Total Keys: 23)
- schemas.GoogleSecuritySafebrowsingV4ThreatHit (Total Keys: 19)
- schemas.GoogleSecuritySafebrowsingV4ThreatInfo (Total Keys: 10)
- schemas.GoogleSecuritySafebrowsingV4ThreatListDescriptor (Total Keys: 5)
- schemas.GoogleSecuritySafebrowsingV4ThreatMatch (Total Keys: 9)

The following keys were changed:
- resources.encodedFullHashes.methods.get.response.$ref (Total Keys: 1)
- resources.encodedUpdates.methods.get.response.$ref (Total Keys: 1)
- resources.fullHashes.methods.find.request.$ref (Total Keys: 1)
- resources.fullHashes.methods.find.response.$ref (Total Keys: 1)
- resources.threatHits.methods.create.request.$ref (Total Keys: 1)
- resources.threatHits.methods.create.response.$ref (Total Keys: 1)
- resources.threatListUpdates.methods.fetch.request.$ref (Total Keys: 1)
- resources.threatListUpdates.methods.fetch.response.$ref (Total Keys: 1)
- resources.threatLists.methods.list.response.$ref (Total Keys: 1)
- resources.threatMatches.methods.find.request.$ref (Total Keys: 1)
- resources.threatMatches.methods.find.response.$ref (Total Keys: 1)