[Security] resolve CRLF attack on RequestIgnoreBatteryOptimizations

1. refer the proposed solution in the b/198783395
2. similar concept is applied in the https://source.corp.google.com/sc-dev/packages/modules/Permission/PermissionController/src/com/android/permissioncontroller/permission/model/legacy/PermissionGroups.java;l=118

Bug: 198783395
Test: make SettingsRoboTests
Change-Id: I838825e31b98e62d2683995e59dbf4388f5684fc
1 file changed