Demonstrates how to create a DelayedConfirmationView in your wearable app. In this sample, pressing a button on the phone app sends a message to the wearable to start a simple activity. This activity displays a DelayedConfirmationView that starts when the user presses "Start Timer." Then, callbacks are implemented on both the wearable and phone to show when the timer is selected or finishes. The activity on the wearable uses BoxInsetLayout to automatically apply appropriate margins based on whether the display is square or circular.