✨ Show call participants

lib/translations/en_us.dart

@@ -257,6 +257,8 @@ const i18nEnglish = {
       'Are your sure to delete message @id? This action cannot be undone!',
   'call': 'Call',
   'callOngoing': 'A call is ongoing...',
+  'callOngoingEmpty': 'A call is on hold...',
+  'callOngoingParticipants': '@count people are calling...',
   'callJoin': 'Join',
   'callResume': 'Resume',
   'callMicrophone': 'Microphone',

lib/translations/zh_cn.dart

@@ -238,6 +238,8 @@ const i18nSimplifiedChinese = {
   'messageDeletionConfirmCaption': '你确定要删除消息 @id 吗？该操作不可撤销。',
   'call': '通话',
   'callOngoing': '一则通话正在进行中…',
+  'callOngoingEmpty': '一则通话待机中…',
+  'callOngoingParticipants': '@count 人正在进行通话…',
   'callJoin': '加入',
   'callResume': '恢复',
   'callMicrophone': '麦克风',