feat: [dialogflow] Add the enable_extended_streaming flag (#4724)

* feat: Add the enable_extended_streaming flag
chore: remove extraneous backend config

PiperOrigin-RevId: 569315665

Source-Link: googleapis/googleapis@a24bc56

Source-Link: googleapis/googleapis-gen@afd0643
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

packages/google-cloud-dialogflow/protos/google/cloud/dialogflow/v2/participant.proto

@@ -605,6 +605,27 @@ message StreamingAnalyzeContentRequest {
   // CX agent.
   google.protobuf.Struct cx_parameters = 13;
 
+  // Optional. Enable full bidirectional streaming. You can keep streaming the
+  // audio until timeout, and there's no need to half close the stream to get
+  // the response.
+  //
+  // Restrictions:
+  //
+  // - Timeout: 3 mins.
+  // - Audio Encoding: only supports
+  // [AudioEncoding.AUDIO_ENCODING_LINEAR_16][google.cloud.dialogflow.v2.AudioEncoding.AUDIO_ENCODING_LINEAR_16]
+  // and
+  // [AudioEncoding.AUDIO_ENCODING_MULAW][google.cloud.dialogflow.v2.AudioEncoding.AUDIO_ENCODING_MULAW]
+  // - Lifecycle: conversation should be in `Assist Stage`, go to
+  //   [Conversation.CreateConversation][] for more information.
+  //
+  // InvalidArgument Error will be returned if the one of restriction checks
+  // failed.
+  //
+  // You can find more details in
+  // https://cloud.google.com/agent-assist/docs/extended-streaming
+  bool enable_extended_streaming = 11 [(google.api.field_behavior) = OPTIONAL];
+
   // Enable partial virtual agent responses. If this flag is not enabled,
   // response stream still contains only one final response even if some
   // `Fulfillment`s in Dialogflow virtual agent have been configured to return

packages/google-cloud-dialogflow/samples/generated/v2/participants.streaming_analyze_content.js

@@ -85,6 +85,24 @@ function main(participant) {
    *  CX agent.
    */
   // const cxParameters = {}
+  /**
+   *  Optional. Enable full bidirectional streaming. You can keep streaming the
+   *  audio until timeout, and there's no need to half close the stream to get
+   *  the response.
+   *  Restrictions:
+   *  - Timeout: 3 mins.
+   *  - Audio Encoding: only supports
+   *  AudioEncoding.AUDIO_ENCODING_LINEAR_16 google.cloud.dialogflow.v2.AudioEncoding.AUDIO_ENCODING_LINEAR_16 
+   *  and
+   *  AudioEncoding.AUDIO_ENCODING_MULAW google.cloud.dialogflow.v2.AudioEncoding.AUDIO_ENCODING_MULAW 
+   *  - Lifecycle: conversation should be in `Assist Stage`, go to
+   *    Conversation.CreateConversation   for more information.
+   *  InvalidArgument Error will be returned if the one of restriction checks
+   *  failed.
+   *  You can find more details in
+   *  https://cloud.google.com/agent-assist/docs/extended-streaming
+   */
+  // const enableExtendedStreaming = true
   /**
    *  Enable partial virtual agent responses. If this flag is not enabled,
    *  response stream still contains only one final response even if some

packages/google-cloud-dialogflow/samples/generated/v2/snippet_metadata_google.cloud.dialogflow.v2.json

@@ -4114,7 +4114,7 @@
             "segments": [
                 {
                     "start": 25,
-                    "end": 122,
+                    "end": 140,
                     "type": "FULL"
                 }
             ],
@@ -4163,6 +4163,10 @@
                         "name": "cx_parameters",
                         "type": ".google.protobuf.Struct"
                     },
+                    {
+                        "name": "enable_extended_streaming",
+                        "type": "TYPE_BOOL"
+                    },
                     {
                         "name": "enable_partial_automated_agent_reply",
                         "type": "TYPE_BOOL"