Cross Reference: /development/samples/browseable/MessagingService/res/drawable-mdpi

`Name`	`Date`	`Size`
Up to higher level directory
`android_contact.png`	05-Oct-2017	`959`
`ic_launcher.png`	05-Oct-2017	`2.9K`
`notification_icon.png`	05-Oct-2017	`609`