Lower the RAM requirement for hardware acceleration

There are legacy devices with about 365 MBytes of RAM
available to the kernel (HDPI with 512 MB RAM onboard).
Lowering the requirement value for available RAM allows
these devices to also use hardware acceleration, thus
making the UI a lot more responsive and fixing bugs like
this: https://dl.dropboxusercontent.com/u/16268774/Screenshots/Phone/Screenshot_2013-10-07-01-27-45.png
(notice the "shadow" is missing)

PS 2: Any device can use hwa by Setting ro.sys.force_full_hwa to true inside the build.prop, original AOSP requirements stay intact
PS 3: Style
Change-Id: I0343ddbb3c7f95bed674b5852772ab819065ea69
Frameworks: add never sleep screen mode (1/2)

to qs ScreenTimer Tile
to PW ScreenTimer toggle
as general option as well

Change-Id: Ic78356c1b96044562efbce3cb0d0d5c93d773a19

Credit to kufikugel for writing this