Stock Recents Background Color Changer [1/2]

Conflicts:
	core/java/android/provider/Settings.java

Change-Id: Id7c83093f072536503c63e31b2e3be2e4c765144

Conflicts:
	core/java/android/provider/Settings.java
Revert "[2/2] Add lockscreen rotation as an optional rotation setting"

This reverts commit 371b626234137fec9429877713bf24ae4c4fe166.