Continuous voice_assistant and silence detection (#4892)

esphome/components/api/api_server.cpp

@@ -428,16 +428,16 @@ void APIServer::on_shutdown() {
 }
 
 #ifdef USE_VOICE_ASSISTANT
-bool APIServer::start_voice_assistant() {
+bool APIServer::start_voice_assistant(const std::string &conversation_id) {
   for (auto &c : this->clients_) {
-    if (c->request_voice_assistant(true))
+    if (c->request_voice_assistant(true, conversation_id))
       return true;
   }
   return false;
 }
 void APIServer::stop_voice_assistant() {
   for (auto &c : this->clients_) {
-    if (c->request_voice_assistant(false))
+    if (c->request_voice_assistant(false, ""))
       return;
   }
 }