[ALPS04455690] Whitelist some lmkd properties that go into /vendor/build.prop

Add whitelist for the following properties,
      ro.lmk.use_minfree_levels
      ro.lmk.low
      ro.lmk.medium
      ro.lmk.critical
      ro.lmk.kill_timeout_ms
      ro.lmk.swap_free_low_percentage

This is just a temp solution because those properties should be
put in system/sepolicy/public/property_contexts, but it is not
ready currently. Once it is ready for those properties, this
patch will be rolled back.

MTK-Commit-Id: bc8b76b56605d264af1727cd234a5406da372744

Change-Id: Id8db6725e9dfeeeebd401c8922fe8004c5f5c5b4
CR-Id: ALPS04455690
Feature: Memory Optimization