Revert "Reimplement expanded desktop on top of immersive mode."

This reverts commit 396c8b56e88c98d9834124ef09a988a5ecc87fdb.
Reimplement expanded desktop on top of immersive mode.

Also add xxhdpi drawables (blunden)

Change-Id: I8ed08afebef0bb08a2694b1dbdd6dd1887b5b065
[1/2] Forward port power connect/disconnect notification support

Original commit info:

    [1/2] Power connect/disconnect notification support

    part 1/2: frameworks/base PowerUI and Settings
    http://review.cyanogenmod.org/#/c/35241/

    part 2/2: packages/apps/Settings Sound settings
    http://review.cyanogenmod.org/#/c/35242/

    Change-Id: I36a6b9f924d2cd52191a8e83a744745b37c5b068

Change-Id: Ib865e1c296cb8e1d957b2a48616c88ceaba5c008