Temporarily change uid to appId

Due to b/192431153, PermissionMonitor only apply permission to
app id which is listed in settings. Thus, temporarily change uid
to appId.

Bug: 192116643
Test: atest ConnectivityManagerTest#testUidsAllowedOnRestricted\
      Networks with system & secondary user.
Change-Id: Iadec66344d88bd80170cd5441270b768cdbe0917

service/src/com/android/server/connectivity/PermissionMonitor.java

@@ -281,7 +281,14 @@ public class PermissionMonitor {
     @VisibleForTesting
     synchronized void updateUidsAllowedOnRestrictedNetworks(final Set<Integer> uids) {
         mUidsAllowedOnRestrictedNetworks.clear();
-        mUidsAllowedOnRestrictedNetworks.addAll(uids);
+        // This is necessary for the app id to match in isUidAllowedOnRestrictedNetworks, and will
+        // grant the permission to all uids associated with the app ID. This is safe even if the app
+        // is only installed on some users because the uid cannot match some other app – this uid is
+        // in effect not installed and can't be run.
+        // TODO (b/192431153): Change appIds back to uids.
+        for (int uid : uids) {
+            mUidsAllowedOnRestrictedNetworks.add(UserHandle.getAppId(uid));
+        }
     }
 
     @VisibleForTesting