Revert "Creates Flags for Letterbox blurred wallpaper background"

This reverts commit 51a5a076d706a23a1ff07cf398278db2be7a4544.

Reason for revert: Bug: b/300422166 

Change-Id: Ifc0bf0ace53165a8d9b8f13110fd6f92610c82cd
4 files changed