Merge "Cache shadow shaders for showing shadier shapes without shaky shinanigans" into sc-dev am: 3f3b607d am: 37931347

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15189838

Change-Id: I77e405b37864605b25f2b7870b3d0698f61f06cc