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: a55728eb am: 73c160a3

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

Change-Id: I51f6f31e2339920f70afdf634fa8c50acce3c933