The media for Google Photos app allow users to login on Android TV using Google Account via Oauth 2.0. The app need permissions (email, profile, photolibrary.readonly and photolibrary) to authenticate user and get user's list of Google photos using Google's photo library Api . Also you can take a backup of Device photos to Cloud (Google Photos) using media for Google Photos app. .
What is media for Google Photos App purpose?
Basic purpose of media for Google Photos app is to provide users access to their Google photos on Android TV using Google's Photos Library API Additionaly user can view a slideshow of their photos as an enhanced feature and also can take a backup of local photos to Cloud (Google Photos).