Revert "frameworks/base: Make minfree values optimal for 32bit devices"

This reverts commit 0ef11bcb.

Revert minfree defaults to the same values that were used in cm-11.0.
Values are 40%, 50%, 60%, 70%, 80%, 100% of the EMPTY_APP value (last item).

Instead of changing this value, config_lowMemoryKillerMinFreeKbytesAbsolute
should be adjusted per device.

Fixes: NIGHTLIES-1361
Change-Id: Ic534f2a2676391182bb055e1126c6ed44f3205fa