abb_charger: Updates from cocore

Change-Id: I4b58d95fce84df491bc112e22121929c6161fcf1
Revert "android: Update Low memory killer to android-3.4 branch"

This removes zRAM specific code that improves it
This reverts commit 5f9a3ec7f0aa8e8e964de3593535965d26b75393.
defconfigs: Enable SCHED_MC

Change-Id: Ic192d7f6d886f8f16fb177efd4d11bd51f5fbcc8