Merge "Fix leaks of personal apps in setApplicationHidden" into rvc-dev am:...

    private void enforcePackageIsSystemPackage(String packageName, int userId)

            throws RemoteException {

        if (!isSystemApp(mIPackageManager, packageName, userId)) {

            throw new IllegalArgumentException(

                    "The provided package is not a system package");

        boolean isSystem;

        try {

            isSystem = isSystemApp(mIPackageManager, packageName, userId);

        } catch (IllegalArgumentException e) {

            isSystem = false;

        }

        if (!isSystem) {

            throw new IllegalArgumentException("The provided package is not a system package");

        }

    }