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

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

Change-Id: Ib4d58d65d585ae2e5a7d0e2457c8a95cfad3088b