Revert "Avoid adding transparency to Shelf Background View"

This reverts commit f7e839659f3c9f4f3370bdfd475d537054b1be6d.

Reason for revert: Regression (b/425383239). ag/33919549 already fixes the original bug b/420181235

Bug: 420181235
Bug: 425383239
Change-Id: I55137774d0391967d8037fe2418db0e6a6a41429
2 files changed