[Bug] 无法自动熄屏

**Describe the bug**
备份开始后出现3s后自动息屏提醒，但是不会自动息屏

**To Reproduce**
Steps to reproduce the behavior:
1. 打开备份时自动熄屏
2. 点击继续开始备份

**Expected behavior**
自动熄屏并在备份完成后重新亮起

**Smartphone (please complete the following information):**
 - Device: [MEIZU21 PRO]
 - OS: [FlymeAIOS2, Android15]
 - Version [2.0.12]

**Additional context**
Add any other context about the problem here.
