Cross Reference: /developers/samples/android/notification/MessagingService/Application/src/main/res/drawable-xxhdpi

`Name`	`Date`	`Size`
Up to higher level directory
`android_contact.png`	06-Dec-2017	`3.2K`
`ic_launcher.png`	06-Dec-2017	`11.6K`
`notification_icon.png`	06-Dec-2017	`1.9K`