Add new enum for modify system settings

Bug: 260056090
Test: manual test
Change-Id: Ifa264de8426c230abd78968d83dcbd857015ff35
diff --git a/stats/enums/app/settings_enums.proto b/stats/enums/app/settings_enums.proto
index 5694e5d..f8bb162 100644
--- a/stats/enums/app/settings_enums.proto
+++ b/stats/enums/app/settings_enums.proto
@@ -3561,6 +3561,11 @@
     // CATEGORY: SETTINGS
     // OS: U
     LONG_BACKGROUND_TASKS = 1975;
+
+    // OPEN: Settings > Apps > Special app access > Modify system settings
+    // CATEGORY: SETTINGS
+    // OS: U
+    MODIFY_SYSTEM_SETTINGS = 1976;
 }
 
 // Battery Saver schedule types.