Cross Reference: /packages/apps/CellBroadcastReceiver/res/drawable-mdpi

`Name`	`Date`	`Size`
Up to higher level directory
`alert_fullscreen_bg.9.png`	06-Dec-2017	`882`
`ic_notify_alert.png`	06-Dec-2017	`897`
`ic_warning_large.png`	06-Dec-2017	`748`
`stat_color_warning.png`	06-Dec-2017	`275`