Revert "tweak dirty_background_ratio, vm_dirty_ratio.."

This reverts commit 09e77f6910f6c7556be1928c17d3fe564ce3ff57.
Revert "lower swappiness to 0"

This reverts commit 762e2604532c81f0c61f18b94b29d29bd8499bea.
Revert "binder: Update to version from msm 3.0 kernel"

This reverts commit 414866a89be1c66b1c22321ade29b2bae2fbd0bf.