Add missing conditional in settings provider

Change-Id: I717e8b87eccbedf1a1abead77e7856a2aa2405fa
diff --git a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
index 44b9d8b..41043eb 100644
--- a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
+++ b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
@@ -905,7 +905,9 @@
     private boolean mutateSystemSetting(String name, String value, int runAsUserId,
             int operation) {
         // Check for permissions first.
-        hasPermissionsToMutateSystemSettings();
+        if (!hasPermissionsToMutateSystemSettings()) {
+            return false;
+        }
 
         // Verify whether this operation is allowed for the calling package.
         if (!isAppOpWriteSettingsAllowedForCallingPackage()) {