Redo conditions for hardware acceleration

Revert "Lower the RAM requirement for hardware acceleration"

This reverts commit 2f361e0535c6503370b65794f84887b24b087bbb.

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: 512 MB RAM or ro.sys.fw.bg_apps_limit=1 in your build.prop since just derivating from AOSP can't be a proper solution
Merge branch 'jellybean-4.3' of github.com:WoH/android_frameworks_base into jellybean-4.3