Merge "Cache shadow shaders for showing shadier shapes without shaky...

Merge "Cache shadow shaders for showing shadier shapes without shaky shinanigans" into sc-dev am: 3f3b607d am: e3843946

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

Change-Id: I645210848dbb493a55ab56536ffd3f82ba56d1e3