If the interface disappears between interfaceAdded() and setInterfaceUp, we'll crash with an IllegalStateException in NetworkManagementService#setInterfaceConfig. Ignore the error instead. This should be safe because we don't modify any state unless our calls succeed. Bug: 62870779 Test: builds aosp_bullhead-eng Change-Id: If8c2375f7fffe25a9fa79dc4f1981c745384a276