chore(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:
- fullyEncodeReservedExpansion (Total Keys: 1)
- 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 (Total Keys: 1)
- resources.encodedUpdates.methods.get.response (Total Keys: 1)
- resources.fullHashes.methods.find.request (Total Keys: 1)
- resources.fullHashes.methods.find.response (Total Keys: 1)
- resources.threatHits.methods.create.request (Total Keys: 1)
- resources.threatHits.methods.create.response (Total Keys: 1)
- resources.threatListUpdates.methods.fetch.request (Total Keys: 1)
- resources.threatListUpdates.methods.fetch.response (Total Keys: 1)
- resources.threatLists.methods.list.response (Total Keys: 1)
- resources.threatMatches.methods.find.request (Total Keys: 1)
- resources.threatMatches.methods.find.response (Total Keys: 1)

Author: yoshi-automation

docs/dyn/safebrowsing_v4.encodedUpdates.html

@@ -103,7 +103,7 @@ <h3>Method Details</h3>
   An object of the form:
 
     {
-  &quot;listUpdateResponses&quot;: [ # The list updates requested by the clients.
+  &quot;listUpdateResponses&quot;: [ # The list updates requested by the clients. The number of responses here may be less than the number of requests sent by clients. This is the case, for example, if the server has no updates for a particular list.
     { # An update to an individual list.
       &quot;additions&quot;: [ # A set of entries to add to a local threat type&#x27;s list. Repeated to allow for a combination of compressed and raw data to be sent in a single response.
         { # A set of threats that should be added or removed from a client&#x27;s local database.

docs/dyn/safebrowsing_v4.threatListUpdates.html

@@ -94,7 +94,7 @@ <h3>Method Details</h3>
   body: object, The request body.
     The object takes the form of:
 
-{ # Describes a Safe Browsing API update request. Clients can request updates for multiple lists in a single request. NOTE: Field index 2 is unused. NEXT: 5
+{ # Describes a Safe Browsing API update request. Clients can request updates for multiple lists in a single request. The server may not respond to all requests, if the server has no updates for that list. NOTE: Field index 2 is unused. NEXT: 5
   &quot;client&quot;: { # The client metadata associated with Safe Browsing API requests. # The client metadata.
     &quot;clientId&quot;: &quot;A String&quot;, # A client ID that (hopefully) uniquely identifies the client implementation of the Safe Browsing API.
     &quot;clientVersion&quot;: &quot;A String&quot;, # The version of the client implementation.
@@ -128,7 +128,7 @@ <h3>Method Details</h3>
   An object of the form:
 
     {
-  &quot;listUpdateResponses&quot;: [ # The list updates requested by the clients.
+  &quot;listUpdateResponses&quot;: [ # The list updates requested by the clients. The number of responses here may be less than the number of requests sent by clients. This is the case, for example, if the server has no updates for a particular list.
     { # An update to an individual list.
       &quot;additions&quot;: [ # A set of entries to add to a local threat type&#x27;s list. Repeated to allow for a combination of compressed and raw data to be sent in a single response.
         { # A set of threats that should be added or removed from a client&#x27;s local database.