HarmonyOS 应用首次加载的时候，Ability的背景时间是否可以延长

"abilities": [
  {
    "name": "EntryAbility",
    "srcEntry": "./ets/entryability/EntryAbility.ets",
    "description": "$string:EntryAbility_desc",
    "launchType": "singleton",
    "icon": "$media:logo",
    "label": "$string:EntryAbility_label",
    "startWindowIcon": "$media:startIcon",
    "startWindowBackground": "$color:start_window_background",
    "exported": true,
    "skills": [
      {
        "entities": [
          "entity.system.home"
        ],
        "actions": [
          "action.system.home"
        ]
      }
    ]
  }
]

EntryAbility加载了web页面，然后startWindowIcon和startWindowBackground显示时间太短了，是否可以延长？