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: e1d92cae am: e442126d

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

Change-Id: I9a52b99621487a8b1ffd917bd0ba972f7c4fbf26