Revert "Revert "SystemUI: Always show translucent decor on recents panel""

This reverts commit 50375a8d882da032f37e16bed97db95351aa8445.

Change-Id: I551471689454b7749c742b208f92908afdad8ebb
Merge "Revert "Revert "SystemUI: Always show translucent decor on recents panel""" into kk44