Merge "Revert "Animate in a background for kg unlock icon"" into sc-dev am: dea99bf5 am: 92c26041 am: c0b79911

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15302787

Change-Id: I04b74885a0c01614d95eaf25692f64560b91405e