Partially enforce permission when calling getNetworkInfoForUid

Test: atest ConnectivityServiceTest#testGetNetworkInfoForUid
Change-Id: Ie0ac289e77a865cf3cc98a6a2bbd5b25cf402622

service/src/com/android/server/ConnectivityService.java

@@ -1976,6 +1976,9 @@ public class ConnectivityService extends IConnectivityManager.Stub
     @Nullable
     public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) {
         enforceAccessPermission();
+        if (uid != mDeps.getCallingUid()) {
+            enforceNetworkStackPermission(mContext);
+        }
         final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
         if (nai == null) return null;
         return getFilteredNetworkInfo(nai, uid, ignoreBlocked);