Get rid of the gfx buffer workarounds

Concurrent buffers are now working, we don't need this crap anymore

Change-Id: I80c35bb67c41e9c61faeb6f3cd80d3e9033f9641
Treat all screenshots as going to a CPU consumer

Change-Id: Iee55fa03d9602f31a3b7f4f188778c58e8ca0131
Optimized all png's.

Change-Id: I6b9a374b08a567e92c024df8d16844e7859f8cf7
to: optipng -nc -nb -o7
Overlay: Use fade out animation instead of crt-off animation

Change-Id: Ib98a70ec828965ab38a333653cf9a1ebaae050f7
wifi.supplicant_scan_interval: 15 -> 30

Change-Id: I93a160e02367ec936980751846338e3fe281fcf6
Stweaks Support

Change-Id: I5ea72126ba84a2e2346fcbeb55ece5117ea1fdc7