Merge "Cache blur shaders only when blur is enabled" into sc-dev am:...

Merge "Cache blur shaders only when blur is enabled" into sc-dev am: e093fd9e am: 4d77c14b am: 54996dbe

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/14939032

Change-Id: Ib057e19a7eb381ae9672b51ab8ea806030199c4b