fix: ASW-65 停止捕包时等待 tcpdump 资源释放，防止 pcap 不全

src/main/java/net/geedge/api/controller/APIController.java

@@ -142,7 +142,7 @@ public class APIController {
     }
 
     @DeleteMapping("/pcap")
-    public void stopTcpdump(@RequestParam String id,
+    public synchronized void stopTcpdump(@RequestParam String id,
                             @RequestParam(required = false, defaultValue = "false") Boolean returnFile,
                             HttpServletResponse response) throws IOException {
         AdbUtil.CommandResult result = adbUtil.stopTcpdump(id);