The AOSP ServiceManager: Permission failure: android.permission.ACCESS_SURFACE_FLINGER error occurs when system services attempt to access SurfaceFlinger display composition without system UID permissions.

AndroidManifest.xml & SELinux Fix

AndroidManifest.xmlxml
<!-- Declare system user ID permission for SurfaceFlinger access -->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.systemui"
    android:sharedUserId="android.uid.system">
    
    <uses-permission android:name="android.permission.ACCESS_SURFACE_FLINGER" />
</manifest>