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: 0ebf39e6

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

Change-Id: I163720824adf91efa1f5d115aeac40a6e8f18746