支持更多音视频格式，添加点播测试页面

Example/SellyCloudSDK/VideoCall/SellyVideoCallViewController.m

@@ -230,7 +230,7 @@
 }
 
 - (void)rtcSession:(SellyRTCSession *)session connectionStateChanged:(SellyRTCConnectState)state userId:(nullable NSString *)userId {
-    NSLog(@"ice.connectionStateChanged == %ld",state);
+    NSLog(@"ice.connectionStateChanged userId == %@ statu == %ld",userId,state);
     // 初始化 PiP Manager
     if (state == SellyRTCConnectStateConnected && !self.pipManager) {
         self.pipManager = [[SellyCallPiPManager alloc] initWithRenderView:self.remoteView];