Update enforceMeteredApnPolicy to follow the compat flag

On V+, ConnectivityService uses uid blocking state in BpfMap instead of
asking NetworkPolicyManager.
But, there was one behavior difference because NetworkPolicyManager
considers the network is always not blocked for apps without Internet
permission.
To ensure backward compatibility, the
NETWORK_BLOCKED_WITHOUT_INTERNET_PERMISSION flag was introduced in
aosp/3076606, aosp/3088285.

This CL updates enforceMeteredApnPolicy to respect this flag for
backward compatibility.

Test: CSEnforceMeteredApnPolicy
Bug: 404428733
Bug: 370383309
Flag: EXEMPT bugfix
Change-Id: I631f4f840818e1d40f20fccae1ec1a2cbbb6a166

framework/src/android/net/connectivity/ConnectivityCompatChanges.java

@@ -111,6 +111,8 @@ public final class ConnectivityCompatChanges {
      * {@link android.net.ConnectivityManager#getActiveNetwork()} always returns null.
      * {@link android.net.ConnectivityManager.NetworkCallback#onBlockedStatusChanged()} is always
      * called with blocked=true.
+     * {@link android.net.ConnectivityManager#requestNetwork} can not bring up metered network if
+     * the uid is restricted from using metered networks.
      * <p>
      * For backwards compatibility, apps running on older releases, or targeting older SDK levels,
      * network access from apps without {@link android.Manifest.permission#INTERNET} permission is