Merge "Make REQUEST_NETWORK_SCORES signature only."

         recommendations and scores from the NetworkScoreService.

         <p>Not for use by third-party applications. @hide -->

    <permission android:name="android.permission.REQUEST_NETWORK_SCORES"

        android:protectionLevel="signature|privileged" />

        android:protectionLevel="signature" />

    <!-- ======================================= -->

    <!-- Permissions for short range, peripheral networks -->