refactor(device): 重构 ArmCloudApiClient 类

- 格式化代码，提高可读性
- 优化 JSON 构建和解析逻辑
- 统一异常处理方式
- 简化部分代码结构，提高维护性

app/src/main/java/com/example/retention/device/ArmCloudApiClient.java

@@ -302,15 +302,21 @@ public class ArmCloudApiClient {
       json.put("page", page);
       json.put("rows", rows);
 
-              if (armServerCode != null) json.put("armServerCode", armServerCode);
-              if (deviceCode != null) json.put("deviceCode", deviceCode);
+      if (armServerCode != null) {
+        json.put("armServerCode", armServerCode);
+      }
+      if (deviceCode != null) {
+        json.put("deviceCode", deviceCode);
+      }
       if (padCodes != null && padCodes.length > 0) {
         json.put("padCodes", new JSONArray(Arrays.asList(padCodes)));
       }
       if (groupIds != null && groupIds.length > 0) {
         json.put("groupIds", new JSONArray(Arrays.asList(groupIds)));
       }
-              if (idc != null) json.put("idc", idc);
+      if (idc != null) {
+        json.put("idc", idc);
+      }
 
     } catch (JSONException e) {
       LogFileUtil.logAndWrite(Log.ERROR, "ArmCloudApiClient", "getInstanceListInfo: JSON 构建失败", e);