How to add an Android notification that asks for confirmation of "Yes" or "No" when the android is worn?
To create this in a notification, you need to create your own notification. See here for creating custom layouts for notifications - https://developer.android.com/training/wearables/apps/layouts.html#CustomNotifications
For this type of confirmation, yes / no predefined Wear activity / layout. You will need to build it yourself - perhaps with BoxInsetLayout and two ImageButtons for yes and no.
Information about BoxInsetLayout can be found here - https://developer.android.com/training/wearables/ui/layouts.html#same-layout
This ensures that your layout will look on both square and round devices.
If you're looking for a common Wear experience, you'll probably want to use DelayedConfirmationTimer and ConfirmationActivity. They are commonly used to give the user time to cancel their input and provide an indication that the process is completed, respectively. Here you can find the details https://developer.android.com/training/wearables/ui/confirm.html