Android Dev Summit, October 23-24: two days of technical content, directly from the Android team. Sign-up for livestream updates.
added in version 24.1.0

android.support.app.recommendation

Annotations

ContentRecommendation.ContentMaturity  
ContentRecommendation.ContentPricing  
ContentRecommendation.ContentStatus  
ContentRecommendation.ContentType  
ContentRecommendation.IntentType  

Classes

ContentRecommendation The ContentRecommendation object encapsulates all application provided data for a single content recommendation item. 
ContentRecommendation.Builder Builder class for ContentRecommendation objects. 
ContentRecommendation.IntentData Object used to encapsulate the data to be used to build the PendingIntent object associated with a given content recommendation, at the time this recommendation gets posted to the home Screen. 
RecommendationExtender

Helper class to add content info extensions to notifications.