https://developer.android.com/about/versions/marshmallow
https://developer.android.com/about/versions/marshmallow/android-6.0-testing
https://developer.android.com/about/versions/marshmallow/android-6.0
https://developer.android.com/about/versions/marshmallow/android-6.0-changes
https://developer.android.com/about/versions/marshmallow/android-6.0-samples

• Fingerprint Authentication

• App Linking

• Auto Backup for Apps

• Direct Share

• Voice Interactions

• Assist API

• Adoptable Storage Devices

• Notifications

• Themeable ColorStateLists