Revert "setOpaque to true on the surface whenever blur is not su..."

Revert submission 32837458

Reason for revert: This introduced a bug :( we rely on isBlurOpaque=false+blur radius of 0 to show the wallpaper behind the lockscreen. With this fix+battery saver enabled, the wallpaper is no longer visible. Working on a better fix that handles all scenarios.

Reverted changes: /q/submissionid:32837458

Change-Id: I03171687cb4bc24637d4b888e88980e512c0ee00