I want my app to be able to handle search requests from Google Now and appear in its Phone Search list, but I can't find any documentation on this. Does anyone have a link they can offer up?
You can add your application to the Phone Search in Google Now by setting
android:includeInGlobalSearch="true"
in your searchable.xml
configuration file per the Searchable Configuration reference page. Google Now shares the same phone search options as previous versions of Android, which was often called the Quick Search Box. You'll probably also want to reference the Search Suggestions for the Quick Search Box training.