API encryption (#2254)

esphome/components/api/api_connection.cpp

@@ -23,7 +23,13 @@ APIConnection::APIConnection(std::unique_ptr<socket::Socket> sock, APIServer *pa
     : parent_(parent), initial_state_iterator_(parent, this), list_entities_iterator_(parent, this) {
   this->proto_write_buffer_.reserve(64);
 
+#if defined(USE_API_PLAINTEXT)
   helper_ = std::unique_ptr<APIFrameHelper>{new APIPlaintextFrameHelper(std::move(sock))};
+#elif defined(USE_API_NOISE)
+  helper_ = std::unique_ptr<APIFrameHelper>{new APINoiseFrameHelper(std::move(sock), parent->get_noise_ctx())};
+#else
+#error "No frame helper defined"
+#endif
 }
 void APIConnection::start() {
   this->last_traffic_ = millis();