Cross Reference: /prebuilts/sdk/current/support/v17/leanback/res/animator-v21

`Name`	`Date`	`Size`
Up to higher level directory
`lb_playback_bg_fade_in.xml`	21-Oct-2016	`958`
`lb_playback_bg_fade_out.xml`	21-Oct-2016	`959`
`lb_playback_description_fade_out.xml`	21-Oct-2016	`968`

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