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

`Name`	`Date`	`Size`
Up to higher level directory
`android_contact.png`	05-Oct-2017	`1.5K`
`ic_launcher.png`	05-Oct-2017	`4.7K`
`notification_icon.png`	05-Oct-2017	`937`