Fix issue #2749322: addPackageToPreferred throws SecurityException

Change-Id: I96cdc110fd9acca4b6c95d281e819bad1e4557f8
diff --git a/services/java/com/android/server/PackageManagerService.java b/services/java/com/android/server/PackageManagerService.java
index 5ed19a2..49d2a76 100644
--- a/services/java/com/android/server/PackageManagerService.java
+++ b/services/java/com/android/server/PackageManagerService.java
@@ -6593,15 +6593,11 @@
 
 
     public void addPackageToPreferred(String packageName) {
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.SET_PREFERRED_APPLICATIONS, null);
-        Slog.w(TAG, "addPackageToPreferred: no longer implemented");
+        Slog.w(TAG, "addPackageToPreferred: this is now a no-op");
     }
 
     public void removePackageFromPreferred(String packageName) {
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.SET_PREFERRED_APPLICATIONS, null);
-        Slog.w(TAG, "removePackageFromPreferred: no longer implemented");
+        Slog.w(TAG, "removePackageFromPreferred: this is now a no-op");
     }
 
     public List<PackageInfo> getPreferredPackages(int flags) {