omni: add MANAGE_USERS perm to OpenDelta

Change-Id: I0d63e27f511d1c5f128726dc6de54c4952792522
diff --git a/prebuilt/etc/permissions/privapp-permissions-omni.xml b/prebuilt/etc/permissions/privapp-permissions-omni.xml
index 5b56d4b..b6a8f89 100644
--- a/prebuilt/etc/permissions/privapp-permissions-omni.xml
+++ b/prebuilt/etc/permissions/privapp-permissions-omni.xml
@@ -44,6 +44,7 @@
         <permission name="android.permission.ACCESS_CACHE_FILESYSTEM"/>
         <permission name="android.permission.REBOOT"/>
         <permission name="android.permission.RECOVERY"/>
+        <permission name="android.permission.MANAGE_USERS"/>
     </privapp-permissions>
 
     <privapp-permissions package="org.omnirom.logcat">