[mirotalksfu] - add test speaker btn

public/views/Room.html

@@ -327,6 +327,11 @@ access to use this app.
                                 <p>Speaker:</p>
                             </div>
                             <select id="speakerSelect" class="form-select text-light bg-dark"></select>
+                            <hr style="border: 1px solid grey" />
+                            <button id="speakerTestBtn">
+                                <i class="fa-solid fa-circle-play"></i>
+                                <p>Test speaker</p>
+                            </button>
                             <br />
                         </div>
                         <br />