feat: added option to configure the number of sentences in the sugges…

…tion context (#808)

* feat: added option to configure the number of sentences in the suggestion context

PiperOrigin-RevId: 420101041

Source-Link: googleapis/googleapis@549b567

Source-Link: https://github.com/googleapis/googleapis-gen/commit/7d095a8c6a6223dd4ee772c285112483c2afb1c0
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiN2QwOTVhOGM2YTYyMjNkZDRlZTc3MmMyODUxMTI0ODNjMmFmYjFjMCJ9

* 🦉 Updates from OwlBot

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>

google-cloud-dialogflow/src/test/java/com/google/cloud/dialogflow/v2beta1/ParticipantsClientTest.java

@@ -771,7 +771,10 @@ public void suggestSmartRepliesTest() throws Exception {
     SuggestSmartRepliesResponse expectedResponse =
         SuggestSmartRepliesResponse.newBuilder()
             .addAllSmartReplyAnswers(new ArrayList<SmartReplyAnswer>())
-            .setLatestMessage("latestMessage-1424305536")
+            .setLatestMessage(
+                MessageName.ofProjectConversationMessageName(
+                        "[PROJECT]", "[CONVERSATION]", "[MESSAGE]")
+                    .toString())
             .setContextSize(1116903569)
             .build();
     mockParticipants.addResponse(expectedResponse);
@@ -815,7 +818,10 @@ public void suggestSmartRepliesTest2() throws Exception {
     SuggestSmartRepliesResponse expectedResponse =
         SuggestSmartRepliesResponse.newBuilder()
             .addAllSmartReplyAnswers(new ArrayList<SmartReplyAnswer>())
-            .setLatestMessage("latestMessage-1424305536")
+            .setLatestMessage(
+                MessageName.ofProjectConversationMessageName(
+                        "[PROJECT]", "[CONVERSATION]", "[MESSAGE]")
+                    .toString())
             .setContextSize(1116903569)
             .build();
     mockParticipants.addResponse(expectedResponse);