privapps-permission: Grant REQUEST_NETWORK_SCORES to car system apps

NETWORK_REQUEST_SCORES is being changed to a privileged permission from
signature only permission. The wifi stack needs to obtain this permission,
so it can no longer be signature only.

Bug: 113174748
Bug: 135480528
Test: Compiles
Change-Id: Ia824676ee4ddc935346ae22b0aabd6ed4661743f
diff --git a/data/etc/com.android.systemui.xml b/data/etc/com.android.systemui.xml
index a305d48..1d735af 100644
--- a/data/etc/com.android.systemui.xml
+++ b/data/etc/com.android.systemui.xml
@@ -44,6 +44,7 @@
         <permission name="android.permission.READ_NETWORK_USAGE_HISTORY"/>
         <permission name="android.permission.READ_PRIVILEGED_PHONE_STATE"/>
         <permission name="android.permission.REAL_GET_TASKS"/>
+        <permission name="android.permission.REQUEST_NETWORK_SCORES"/>
         <permission name="android.permission.RECEIVE_MEDIA_RESOURCE_USAGE"/>
         <permission name="android.permission.START_ACTIVITIES_FROM_BACKGROUND" />
         <permission name="android.permission.START_ACTIVITY_AS_CALLER"/>