Merge "Use a linear interpolator for screen off, since the reveal effects...

Merge "Use a linear interpolator for screen off, since the reveal effects already interpolate the reveal amount internally." into sc-dev am: e2dc0091 am: 78e0d0fc am: f4b215ca

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15131934

Change-Id: I7b9a86c9a8b85511d9a059b914279affd5fb4953