Merge "[View Controllers] (3/3) Move (most of) KSBVC's alpha calculation out of NPVController and into KSBVC." into sc-v2-dev am: e38d387169 am: 55d4b13de1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15597557

Change-Id: Iabb05f37a7c980ea371875f32c042d4739eb3356