Merge "don't block uninstall of unknown packages" into oc-dev

        synchronized (mPackages) {

            final PackageSetting ps = mSettings.mPackages.get(packageName);

            if (ps == null || filterAppAccessLPr(ps, Binder.getCallingUid(), userId)) {

                return true;

                return false;

            }

            return mSettings.getBlockUninstallLPr(userId, packageName);

        }