Don't crash on startup if we can't fetch the interface list.

The intent of the code was to catch exceptions, but it wasn't
actually doing that because when a netd command fails we get an
IllegalStateException, not a RemoteException.

Bug: 23581852
Change-Id: I66c7c33bdc7b0d0de4fa5cd92dff054797cf860f

service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java

@@ -396,7 +396,7 @@ class EthernetNetworkFactory {
                     }
                 }
             }
-        } catch (RemoteException e) {
+        } catch (RemoteException|IllegalStateException e) {
             Log.e(TAG, "Could not get list of interfaces " + e);
         }
     }